JP2002232247A - Adaptive sound quality volume control device, and audio device, communication terminal device, and information terminal device using adaptive sound quality volume control device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an adaptive sound quality volume control device that can be heard naturally in terms of audibility even when the level of a sound source signal changes rapidly. SOLUTION: A sound quality volume control device 30 includes a microphone 36 that collects surrounding sounds in which a sound source signal is loudspeaked, and a signal level adjustment unit 33 based on the sound collection signal and the sound source signal collected by the microphone 36. A control unit 40 that calculates and controls the adjustment amount of the frequency characteristic adjustment unit 32 at predetermined time intervals.
A sound source signal level change detection unit 50 that detects a change in the signal level of the sound source signal, and an operation time interval of the control unit 40 based on the change in the signal level of the sound source signal detected by the sound source signal level change detection unit 50. And an operation time interval calculation unit 51 for controlling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adaptive sound quality volume control device for controlling a volume level and a frequency characteristic of an audio signal at the time of loudspeaking based on a surrounding noise level at which the audio signal is loudspeaked.

[0002]

2. Description of the Related Art Hitherto, various attempts have been made to automatically adjust a signal level in accordance with an ambient noise level when a sound signal of a television, a radio, a CD, an announcement or the like is amplified by a speaker or the like. Also, with the development of car stereos, attempts have been made to maintain a state that is easy to hear by adjusting the reproduced signal level by grasping the noise level inside and outside the vehicle when reproducing an audio signal in a vehicle such as an automobile.

[0003] Japanese Patent Application Laid-Open No. 55-30240 and Japanese Patent Application Laid-Open No.
FIG. 8 is a block diagram showing an example of a configuration of a conventional adaptive sound quality volume control apparatus for performing sound reproduction by compensating for masking due to noise in the above-mentioned publication. The figure is shown.

An adaptive sound quality control device 1 shown in FIG. 8 outputs a sound source signal based on a sound source such as a CD player, a cassette tape, a radio or an announcement, and an output from the sound source unit 2 by an equalizer or the like. A frequency characteristic adjustment unit 3 for adjusting the gain of each of the predetermined frequencies of the sound source signal; a volume adjustment unit 4 having a volume and the like for adjusting the volume of the sound source signal whose frequency gain is adjusted; An amplifier 5 for amplifying a signal to a predetermined signal level, a speaker 6 for amplifying the amplified sound source signal, and a speaker 6 disposed near the speaker 6 for collecting a loud sound output from the speaker 6 and surrounding noise. Microphone 7,
A control unit 10 for controlling the frequency characteristic adjustment unit 3 and the volume adjustment unit 4 based on signals output from the sound source unit 2 and the microphone 7 is provided.

The control unit 10 includes a microphone signal analysis unit 11 for analyzing a signal output from the microphone 7 (hereinafter referred to as a sound collection signal), and a sound source signal for analyzing a sound source signal output from the sound source unit 2. An analyzing unit 12, a noise signal calculating unit 13 for calculating a noise signal based on the analyzed sound collection signal and the sound source signal, and a frequency characteristic adjusting unit 3 and a volume adjusting unit 4 based on the analyzed sound source signal and the noise signal A compensation amount calculation unit 14 that calculates a compensation amount that is a basis for adjusting the compensation amount, and an adjustment amount update unit 15 that calculates an adjustment amount that controls the frequency characteristic adjustment unit 3 and the volume adjustment unit 4 based on the compensation amount. ing.

[0006] The microphone 7 is arranged near a place where the loud sound loudspeaked by the speaker 6 arranged at an arbitrary place is received, and the microphone 7 collects the loud sound loudspeaked by the speaker 21 and the ambient noise of the microphone 7. This makes it possible to detect noise highly correlated with ambient noise at the listening location.

The microphone signal analyzer 11 has a microphone 7
Since the sound pickup signal collected by the sound source is input, a signal having a high correlation with the ambient noise at the listening location is input, and a predetermined frequency is determined based on the input signal. A signal level component (hereinafter, referred to as a microphone signal component level) in each band is calculated.

The sound source signal analyzer 12 receives the sound source signal output from the sound source 2 and calculates the signal component level of the input sound source signal for each predetermined frequency band. Has become.

The noise signal calculator 13 includes a sound source signal analyzer 12
Signal component level output from microphone and microphone signal analysis unit
The microphone signal component level output from the microphone 11 is input, and the noise signal calculation unit 13 performs a predetermined calculation based on the input sound source signal component level and the microphone signal component level to obtain a noise signal component. The level is calculated.

The compensation amount calculator 14 includes a sound source signal component level calculated by the sound source signal analyzer 12 and a noise signal calculator.
The noise signal component level calculated by the controller 13 is input, and the compensation amount calculator 14 calculates the compensation amount at regular time intervals based on the input sound source signal component level and the noise signal component level. It is supposed to. For example, the compensation amount calculation unit 14 calculates the compensation amount at regular time intervals based on the masking amount of the sound source signal level component by the noise signal level component or the energy ratio between the noise signal level component and the sound source signal level component. .

The adjustment amount updating section 15 receives the compensation amount calculated by the compensation amount calculating section 14,
The adjustment amount update unit 15 calculates an adjustment amount for controlling the frequency characteristic adjustment unit 3 and the volume adjustment unit 4 based on the input compensation amount.

As described above, the adaptive sound quality volume control device 1
Is based on the characteristics of the sound source signal and the characteristics of the ambient noise,
The frequency characteristics and volume of the sound source signal can be controlled, so that even if there is ambient noise or the characteristics of the ambient noise change, the same loudness as when there is no ambient noise It can be played so that you can hear it.

[0013]

However, in the above-mentioned conventional adaptive sound quality volume control device, when the level of the sound source signal changes gradually, the sound can be heard naturally.
When the level of the sound source signal changes suddenly, such as when the sound source signal switches from BGM to an announcement, the adjustment of the sound quality and volume cannot be made in time. Had the problem of becoming

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an adaptive sound quality volume control device capable of hearing naturally even when the level of a sound source signal changes rapidly. It is intended to provide.

[0015]

In order to achieve the above object, an adaptive sound quality volume control device according to the present invention comprises a signal level adjusting means for adjusting a signal level of an input sound source signal, and a frequency characteristic of the sound source signal. Frequency characteristic adjusting means for adjusting, signal level detecting means for detecting a change in the signal level of the sound source signal, a sound pickup signal collected by surrounding sounds in which the sound source signal is loudspeaked, and the input sound source signal A noise level detecting means for detecting a surrounding noise level at which the sound source signal is loudspeaked based on the signal level change of the sound source signal detected by the signal level detecting means and the noise level detected by the noise level detecting means. And a control unit for controlling the signal level adjusting unit and the frequency characteristic adjusting unit based on the noise level.

With this configuration, the adaptive sound quality volume control device of the present invention calculates the surrounding noise level where the sound source signal is loudspeaked based on the sound source signal and the collected sound signal, and uses the noise level and the signal level detecting means. The signal level adjusting means and the frequency characteristic adjusting means are controlled based on a change in the signal level of the detected sound source signal.

Therefore, even if the signal level of the sound source signal changes abruptly, the volume and frequency characteristics of the sound source signal can be adjusted in accordance with the change, and the surrounding noise that makes the sound source signal louder is taken into consideration. Since the volume and frequency characteristics of the lever sound source signal can be adjusted, it is possible to output a sound source signal that can be heard naturally in terms of audibility.

Further, the adaptive sound quality volume control device of the present invention comprises:
The control means calculates adjustment amounts of the signal level adjusting means and the frequency characteristic adjusting means based on the signal level of the sound source signal and the noise level, and controls the signal level adjusting means and the frequency characteristic adjusting means, respectively. And a setting means for setting a calculation time interval of the adjustment amount based on the signal level of the sound source signal detected by the signal level detection means.

With this configuration, the adaptive sound quality volume control device of the present invention calculates the adjustment amounts of the signal level adjustment means and the frequency characteristic adjustment means based on the sound source signal and the noise signal, and uses the adjustment amounts to adjust each signal level adjustment means and frequency characteristic. While controlling the adjusting means, a time interval for calculating the adjustment amount is set based on the signal level of the sound source signal.

Therefore, when the level of the sound source signal changes gradually, the time interval for calculating the adjustment amount is extended, and when the signal level of the sound source signal changes rapidly, the operation time interval of the adjustment amount calculating means is increased. Since it can be shortened, the signal level adjustment means and the frequency characteristic adjustment means can be controlled without delay in adjusting the sound quality and volume,
It is possible to output a sound source signal that can be heard naturally in terms of audibility.

Also, the adaptive sound quality volume control device of the present invention
The control means calculates adjustment amounts of the signal level adjusting means and the frequency characteristic adjusting means based on the signal level of the sound source signal and the noise level, and controls the signal level adjusting means and the frequency characteristic adjusting means, respectively. In addition, the adjustment amount is changed to a preset value based on the signal level of the sound source signal detected by the signal level detection means.

With this configuration, the adaptive sound quality volume control device of the present invention calculates the adjustment amounts of the signal level adjusting means and the frequency characteristic adjusting means based on the sound source signal and the noise signal.
The signal level adjusting means and the frequency characteristic adjusting means are controlled by the adjustment amount, and the adjustment amount is changed to a preset adjustment amount based on the signal level of the sound source signal.

Therefore, even if the signal level of the sound source signal changes abruptly, the amount of adjustment for adjusting the signal level adjusting means and the frequency characteristic adjusting means can be changed so as not to be too large, so that the sound is heard naturally in terms of audibility. It is possible to output a sound source signal that can be used.

Also, the adaptive sound quality volume control device of the present invention
The control means calculates adjustment amounts of the signal level adjusting means and the frequency characteristic adjusting means based on the signal level of the sound source signal and the noise level, and controls the signal level adjusting means and the frequency characteristic adjusting means, respectively. And changing the adjustment amount to a preset value based on the signal level of the sound source signal detected by the signal level detecting means, and changing the signal level of the sound source signal detected by the signal level detecting means. A setting means for setting the calculation time interval of the adjustment amount based on the setting.

With this configuration, the adaptive sound quality sound volume apparatus of the present invention calculates the adjustment amounts of the signal level adjustment means and the frequency characteristic adjustment means based on the sound source signal and the noise signal, and uses the adjustment amounts to adjust the respective signal level adjustment means and the frequency characteristic. In addition to controlling the adjusting means, based on the signal level of the sound source signal, the time interval for calculating the adjustment amount is set and the adjustment amount is changed to a preset value.

Therefore, when the level of the sound source signal changes gradually, the time interval for calculating the adjustment amount is extended, and when the signal level of the sound source signal changes rapidly, the operation time interval of the adjustment amount calculating means is increased. Since it can be shortened, the signal level adjustment means and the frequency characteristic adjustment means can be controlled without delay in adjusting the sound quality and volume,
It is possible to output a sound source signal that can be heard naturally in terms of audibility, and that the amount of adjustment for adjusting the signal level adjusting means and the frequency characteristic adjusting means is not too large even if the signal level of the sound source signal changes rapidly. Therefore, it is possible to output a sound source signal that can be heard naturally in terms of audibility.

Further, the adaptive sound quality volume control device of the present invention comprises:
Signal conversion means for converting the sound source signal and the sound collection signal into a digital signal; adjusting the signal level and the frequency characteristic of the sound source signal; detecting the noise level; and detecting the signal level and the signal level It has a configuration in which the control of the characteristic adjusting means is processed by the digital signal.

With this configuration, the adaptive sound quality volume control device of the present invention calculates the surrounding noise level at which the sound source signal is loudspeaked based on the sound source signal and the collected sound signal by the digital signal, and furthermore, calculates the noise level and the signal level. The signal level adjusting unit and the frequency characteristic adjusting unit are controlled based on a change in the signal level of the sound source signal detected by the detecting unit.

Therefore, various kinds of signal processing such as calculation of the noise level and control of the signal level adjusting means and the frequency characteristic adjusting means can be performed by the program.

Further, the sound apparatus of the present invention is an adaptive sound quality volume control device according to any one of claims 1 to 5, sound source signal output means for outputting a sound source signal to the adaptive sound quality volume control device, and the adaptive sound quality volume control device. And an operating means for operating the adaptive sound quality volume control device.

With this configuration, the acoustic device of the present invention provides a signal level and a frequency characteristic of a sound source signal.
The sound source signal is adjusted by the adaptive sound quality volume control device described above, and the adjusted sound source signal is output from the speaker.

Therefore, even if the surrounding noise using the acoustic device changes, the sound quality and volume of the music or voice loudspeaked from the speaker also change. For example, when the noise is loud, the volume also increases. When the noise is low, the sound volume is at an appropriate level, so that the operator can naturally hear the sound from the speaker.

Further, the communication terminal device according to the present invention has the following features.
An adaptive sound quality volume control device according to any one of claims 1 to 5, and a signal including at least an audio signal is received, and the received audio signal is output to the adaptive sound quality volume control device, and is input to a microphone of the adaptive sound quality volume control device. And a loudspeaker for amplifying the audio signal output from the adaptive sound quality volume control device.

With this configuration, the communication terminal device of the present invention adjusts the signal level and frequency characteristics of the received audio signal by the adaptive sound quality volume control device, and outputs the adjusted audio signal from the speaker. The voice of the operator input from the microphone of the adaptive sound quality volume control device according to any one of (5) to (5) is input to the transmission / reception means and transmitted to the other party.

Therefore, even if the noise around the communication terminal device changes, the sound quality and volume of the voice loudspeaked by the speaker also change. For example, when the noise is loud, the volume also increases. Also, when the noise is low, the volume is at an appropriate level, so that the operator can naturally hear the sound from the speaker.

Further, the information terminal device of the present invention has the following features.
An adaptive sound quality volume control device according to any one of claims 1 to 5, an interface that converts audio data into a predetermined signal and outputs the signal to the adaptive sound quality volume control device, and a speaker that amplifies the audio signal output from the adaptive sound quality volume control device. Is provided.

According to this configuration, the information terminal device of the present invention adjusts the signal level and frequency characteristic when the audio data is applied from the speaker to the main cylinder by the adaptive sound quality volume control device according to any one of claims 1 to 5, and this adjustment is performed. The sound source signal is output from the speaker.

Therefore, even if the surrounding noise using the information terminal device changes, the sound quality and volume of the music or voice loudspeaked from the speaker also change. For example, when the noise is loud, the volume is also increased. When the noise is low, the volume is at an appropriate level, so that the operator can naturally hear the sound from the speaker.

[0039]

Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 shows a first embodiment of an adaptive sound quality volume control device according to the present invention, and an audio device, a communication terminal device and an information terminal device using the adaptive sound quality volume control device. FIG. 1 is a diagram showing an embodiment of an adaptive sound quality volume control device.

The adaptive sound quality volume control device of the present embodiment is an audio device such as a BGM, a loudspeaker system for publicizing an announcement or a car stereo, a communication terminal device such as a cellular phone, or an information terminal device such as a personal computer. Applied to

First, the configuration will be described.

The adaptive sound quality volume control device 30 shown in FIG.
A frequency characteristic adjustment unit 32 that adjusts a gain for each predetermined frequency by using an equalizer or the like to a sound source signal output from a sound source unit 31 such as a D player, a cassette tape, a radio or an announcement, and a volume, and the frequency gain is adjusted. A sound volume adjustment unit 33 that adjusts the volume of the adjusted sound source signal, and an amplifier 34 that amplifies the sound source signal whose volume has been adjusted to a predetermined signal level, and outputs the amplified sound source signal to the speaker 35. I have.

For this reason, the sound source signal output from the sound source unit 31 has its gain adjusted for each predetermined frequency,
The signal level is adjusted and the sound is amplified from the speaker 35.

The adaptive sound quality volume control device 30 is output from a microphone 36 disposed in the vicinity of the speaker 35, an audio signal collected by the microphone 36 (hereinafter referred to as a sound collection signal), and a sound source 31. Control unit that controls the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 based on the received signal.
40, a sound source signal level fluctuation detection unit 50 that detects a sudden change in the signal level of the sound source signal output from the sound source unit 31,
An operation time interval calculation unit 51 that controls the operation time interval of the control unit 40 based on the detection result of the sound source signal level fluctuation detection unit 50
It is composed of

The microphone 36 is provided in the vicinity of a place where the loudspeaker loudly received from the speaker 35 provided in an arbitrary place is received, and collects the loudspeaker sound loudspeaked by the speaker 35 and the ambient noise of the microphone 36. It is designed to make noise and to detect noise having a high correlation with the ambient noise at the listening location.

The control unit 40 receives the sound collection signal output from the microphone 36 and the sound source signal output from the sound source unit 31 and controls the operation time interval calculation unit.
The operation time interval is controlled by 51, and an adjustment amount for controlling the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 is calculated based on the sound collection signal and the sound source signal based on the operation time interval. ing.

The control unit 40 includes a microphone signal analysis unit 41 for analyzing a sound collection signal output from the microphone 36, and a sound source unit.
Sound source signal analysis unit that analyzes the sound source signal output from 31
42, a noise signal calculation unit 43 that calculates a noise signal based on the analyzed sound collection signal and the sound source signal, and adjusts the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 based on the analyzed sound source signal and the noise signal. A compensation amount calculation unit 44 for calculating a compensation amount based on
And an adjustment amount updating unit 45 for calculating an adjustment amount for controlling the volume adjusting unit 33.

The microphone signal analyzer 41 includes a microphone 36
Since the sound pickup signal collected by the sound source is input, a signal having a high correlation with the ambient noise at the listening location is input, and a predetermined frequency is determined based on the input signal. A microphone signal component level for each band is calculated. The microphone signal analyzer 41 outputs the calculated microphone signal component level to the noise signal calculator 43.

The sound source signal analyzer 42 receives the sound source signal output from the sound source unit 31 and calculates the signal component level of the input sound source signal for each predetermined frequency band. Has become. Also, the sound source signal analyzer 42
Outputs the calculated sound source signal component level for each frequency band to the noise signal calculation unit 43 and the compensation amount calculation unit 44.

The noise signal calculator 43 includes a sound source signal analyzer 42
Signal component level output from microphone and microphone signal analysis unit
The microphone signal component level output from 41 is input, and the noise signal calculation unit 43 performs a predetermined operation based on the input sound source signal component level and microphone signal component level, and The level is calculated.

Since the sound signal collected by the microphone 36 includes a sound source signal being reproduced or loudspeaked together with the ambient noise, for example, the noise signal calculation unit 43 calculates the sound signal by the microphone signal analysis unit 41. From the microphone signal component level for each predetermined frequency band,
The noise signal level can be calculated by subtracting the sound source signal component level calculated by the above. Further, the noise signal calculation unit 43 outputs the calculated noise signal component level to the compensation amount calculation unit 44.

When calculating the noise signal component level by subtracting the sound source signal component level,
The calculation is performed in consideration of the current control state, that is, the adjustment amounts of the frequency characteristic adjustment unit 32 and the volume adjustment unit 33.

The compensation amount calculating section 44 includes the sound source signal component level calculated by the sound source signal analyzing section 44 and the noise signal calculating section.
The noise signal component level calculated by 43 is input, and the compensation amount calculation unit 44 calculates the compensation amount at regular time intervals based on the input sound source signal component level and noise signal component level. It is supposed to. For example, the compensation amount calculation unit 44 calculates a compensation amount at regular time intervals based on the masking amount of the sound source signal level component by the noise signal level component or the energy ratio between the noise signal level component and the sound source signal level component. .

The compensation amount calculated by the compensation amount calculation unit 44 is input to the adjustment amount update unit 45.
The adjustment amount update unit 45 calculates an adjustment amount for controlling the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 based on the input compensation amount, and uses the calculated adjustment amount to adjust the frequency characteristic adjustment unit 32 and the volume adjustment unit. 33 is controlled.

Since the compensation amount analyzed at fixed time intervals by the sound source signal analysis unit 42 and the microphone signal analysis unit 41 fluctuates with time, the compensation amount is directly used by the frequency characteristic adjustment unit 32 and the volume adjustment unit 33. If the adjustment amount is used, the sound becomes unnatural before and after the update of the adjustment amount. If the time interval for calculating the amount of compensation is long, the frequency characteristic adjusting unit 32
In addition, the adjustment of the sound quality and the sound volume in the sound volume adjustment unit 33 is delayed, and conversely, if the time interval is short, the adjusted sound source is perceived as fluctuating. Therefore, the operation time interval of the control unit 40 is set to be as long as several tens of milliseconds to several seconds. As a result, the adjustment amount update unit 45
For example, the update amount is calculated based on the correction amount so that the adjustment of the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 is smoothly updated by integration, averaging, or LPF of the output signal of the compensation amount calculation unit 44, and the calculated update amount is calculated. The adjustment amount is output to the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 for control.

The sound source signal level fluctuation detecting section 50 includes a sound source section.
The sound source signal output from 31 is input, and when the signal level of the sound source signal suddenly changes, the sound source signal level fluctuation detection unit 50 detects this level change and the level change occurs. This is notified to the operation time interval calculation unit 51.

When a detection result indicating that the signal level of the sound source signal has suddenly changed is input to the operating time interval calculating section 51, the operating time interval of the entire control section 40 is shortened in a predetermined period. To be set. Therefore, if the signal level of the sound source signal changes suddenly,
Since the operation time interval of the control unit 40 becomes short, the adjustment amount updating unit
The calculation time interval of the adjustment amount output to the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 in 45 is shortened.

Next, the operation of the present embodiment when the signal level of the sound source signal changes rapidly will be described. It is assumed that a sound source signal has been output from the sound source unit 31 in advance.

First, in the sound source section 31, when the sound source signal level suddenly changes, for example, when the sound source changes from BGM to an announcement, the sound source signal level fluctuation detecting section 50 detects that the sound source signal level has changed suddenly, Interval calculator 51
Notify. Next, based on the notification from the sound source signal level fluctuation detection unit 50, the operation time interval calculation unit 51 shortens the operation time interval of the control unit from that in the normal operation for a certain period.

As described above, according to the present embodiment, by detecting a sudden change in the signal level of the sound source signal, the operating time interval calculating section 51 can control the control section based on the change in the signal level of the sound source signal. When the level of the sound source signal changes gently, the operation time interval of the control unit 40 is increased, and the control is performed when the signal level of the sound source signal changes abruptly. The operation time interval of the unit can be shortened. Therefore, it is possible to control the signal level adjustment unit and the frequency characteristic adjustment unit without delaying the adjustment of the sound quality and the volume, and to output a sound source signal that can be heard naturally in terms of audibility.

[Second Embodiment] FIG. 2 shows a second embodiment of an adaptive sound quality volume control device according to the present invention, and an audio device, a communication terminal device and an information terminal device using the adaptive sound quality volume control device. FIG. 1 is a diagram showing an embodiment of an adaptive sound quality volume control device.

Further, the adaptive sound quality volume control device of the present embodiment may be a sound system such as a BGM, a loudspeaker system for loudspeaking announcements or a car stereo, a communication terminal device such as a mobile phone, or an information terminal device such as a personal computer. Applied to

In the present embodiment, the adjustment amount of the adjustment amount updating unit is controlled instead of setting the operation time of the control unit based on the fluctuation of the signal level of the sound source signal in the first embodiment. There is a feature in the point, and the other configuration is the same as that of the first embodiment. Therefore, the same members are denoted by the same reference numerals and description thereof is omitted.

First, the configuration will be described.

The adaptive sound quality volume control device 60 shown in FIG. 2 is based on a microphone 36 disposed near the speaker 35, a sound signal collected by the microphone 36 and a signal output from the sound source unit 31. A control unit 40 that controls the frequency characteristic adjustment unit 32 and the volume adjustment unit 33; a sound source signal level fluctuation detection unit 50 that detects a rapid change in the signal level of the sound source signal output from the sound source unit 31; An adjustment amount changing unit that controls the adjustment amount updating unit 45 based on the fluctuation of the signal level, and sets the adjustment amount that the adjustment amount updating unit 45 outputs to the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 to a preset value. 52
And

The adjustment amount changing unit 52 controls the adjustment amount updating unit 45 to output a preset adjustment amount when a detection result indicating that the signal level of the sound source signal has suddenly changed is input. Has become. As the adjustment amount set in advance,
In order that the adjustment amount is not so large as to be unnatural on the auditory sense, for example, a value having an output level similar to that in the uncontrolled state,
That is, the sound source signal is set to a value that is output as it is.

Next, the operation of the present embodiment when the signal level of the sound source signal changes rapidly will be described.

First, in the sound source section 31, when the sound source signal level suddenly changes, for example, when the sound source changes from BGM to an announcement, the sound source signal level fluctuation detecting section 50 detects that the sound source signal level has suddenly changed. This is notified to the adjustment amount changing unit 52. Next, the adjustment amount changing unit 52 sets the adjustment amount calculated by the adjustment amount updating unit 45 to a preset value, and then outputs this value to the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 as the adjustment amount. And control.

As described above, according to the present embodiment, the abrupt change in the signal level of the sound source signal can be detected by the sound source level fluctuation detecting unit 50, and the adjustment amount changing unit
Since 52 can set the adjustment amount calculated by the adjustment amount update unit based on the change in the signal level of the sound source signal to a preset value, when a sudden change in the signal level of the sound source signal is detected, The adjustment amount can be changed so that the adjustment amount is not too large, and a sound source signal that can be heard naturally in terms of audibility can be output.

[Third Embodiment] FIG. 3 shows a third embodiment of an adaptive sound quality volume control device according to the present invention, and an audio device, a communication terminal device and an information terminal device using the adaptive sound quality volume control device. FIG. 1 is a diagram showing an embodiment of an adaptive sound quality volume control device.

Further, the adaptive sound quality volume control device of this embodiment may be a sound system such as a BGM, a sound system for sounding announcements or a car stereo, a communication terminal device such as a portable telephone, or an information terminal device such as a personal computer. Applied to

Note that the present embodiment is characterized in that the first embodiment is provided with an adjustment amount changing unit for controlling the adjustment amount of the adjustment amount updating unit based on the fluctuation of the signal level of the sound source signal. This adjustment amount changing unit has the same configuration as that of the second embodiment. Other configurations are the same as those of the first embodiment, and therefore, the same members are denoted by the same reference numerals and description thereof will be omitted.

The adaptive sound quality volume control device 70 shown in FIG.
A D-player, cassette tape, a frequency characteristic adjustment unit 32 that adjusts a gain for each predetermined frequency by an equalizer or the like with respect to a sound source signal output from a sound source unit 31 such as a radio or an announcement, and a volume. Volume adjuster 33 that adjusts the volume of the adjusted signal
, An amplifier 34 that amplifies the volume-adjusted signal to a predetermined signal level and outputs the signal to a speaker 35, a microphone 36 disposed near the speaker 35, and a pickup collected by the microphone 36. Based on the sound signal and the signal output from the sound source unit 31, the control unit 40 that controls the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 and a sudden change in the signal level of the sound source signal output from the sound source unit 31 A sound source signal level fluctuation detecting section 50 to detect, an operation time interval calculating section 51 for controlling an operation time interval of the control section 40 based on a detection result of the sound source signal level fluctuation detecting section 50, and a sound source signal level fluctuation detecting section 50 Based on the detection result, the adjustment amount updating unit 45 controls the adjustment amount updating unit 45 to set the adjustment amount output to the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 to a preset value. Composed of 52 .

Next, the operation of this embodiment when the sound source signal level changes abruptly will be described.

First, in the sound source section 31, when the sound source signal level suddenly changes, such as when the sound source changes from BGM to an announcement, the sound source signal level fluctuation detecting section 50 detects that the sound source signal level has changed suddenly, Interval calculator 51
And the adjustment amount changing unit 52 is notified. Next, the adjustment amount changing unit 52 sets the adjustment amount calculated by the adjustment amount updating unit 45 to a preset value, and then outputs this value to the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 as the adjustment amount. And control. Further, based on the notification from the sound source signal level fluctuation detection unit 70, the operation time interval calculation unit 51 shortens the operation time interval of the control unit in a certain period as compared with the normal operation.

As described above, according to the present embodiment, in addition to the effects of the first embodiment, a sharp change in the signal level of the sound source signal can be detected, and the adjustment amount changing unit 52 can Since the adjustment amount calculated by the adjustment amount update unit based on the change in the signal level can be set to a preset value, if a sudden change in the signal level of the sound source signal is detected, the adjustment amount is too large. It is possible to change the adjustment amount so that the sound source signal can be heard naturally in terms of audibility.

[Fourth Embodiment] FIG. 4 shows a fourth embodiment of an adaptive sound quality volume control device according to the present invention, and an audio device, a communication terminal device and an information terminal device using the adaptive sound quality volume control device. FIG. 1 is a diagram showing an embodiment of an adaptive sound quality volume control device.

Further, the adaptive sound quality volume control device of the present embodiment may be a sound system such as a BGM, a loudspeaker system or a car stereo for loudspeaking announcements, a communication terminal device such as a mobile phone, or an information terminal device such as a personal computer. Applied to

The present embodiment is characterized in that the control operation of the control unit in any one of the first to third embodiments is performed by digital signal processing. Since the second embodiment is the same as the second embodiment and the third embodiment, the same members are denoted by the same reference numerals and description thereof will be omitted.

The adaptive sound quality volume control device 80 shown in FIG.
Analog / digital (hereinafter referred to as A / D) for converting a sound source signal output from a sound source unit 31 such as a D player, a cassette tape, a radio or an announcement into a digital signal.
A conversion unit 81 and an interface (hereinafter, referred to as I / F)
A signal processing unit 83 that adjusts the gain and volume of each of the digitally converted predetermined frequencies via a digital converter 82, and a digital / analog (hereinafter, D / A) that converts the digital signal that has been processed into an analog signal. A conversion unit 84, an amplifier 34 that amplifies a signal converted into an analog signal to a predetermined signal level and outputs the signal to a speaker 35, a microphone 36 disposed near the speaker 35, and sound collection by the microphone 36. A / which converts the converted audio signal into a digital signal
And a D conversion unit 85.

Each of the A / D conversion sections 81 and 85 receives the sound source signal output from the sound source section 31 and the sound collection signal output from the microphone 36, respectively. The units 81 and 85 convert input signals into digital signals and output the digital signals to the signal processing unit 83.

The signal processing section 83 receives a signal converted into a digital signal of a sound source signal and a digital signal of a sound collection signal. The signal processing section 83 according to any one of the first to third embodiments described above. The operation shown is performed by digital signal processing. Specifically, a noise signal is calculated based on the sound source signal and the sound collection signal, and the signal level of the sound source signal and the gain of the frequency are adjusted.

The signal processing section 83 performs a signal processing as described above, and stores a boot program and the like in a ROM (Read Onl).
y Memory) 86 and RAM (random acc for main memory)
essmemory) 87 and a central processing unit (hereinafter, referred to as a central processing unit) that performs the signal processing described in the first to third embodiments.
CPU) 88, and the CPU 88 includes each I / F 82,
The ROM 86 and the RAM 87 are connected to a bus.

The signal processing shown in the first embodiment is to generate a noise signal by subtracting a sound source signal from a sound collection signal for each predetermined frequency band, and to generate a noise signal based on the noise signal. The amount of adjustment for adjusting the gain level and the signal level of the frequency band is calculated to process each level of the sound source signal, and based on the change in the signal level of the sound source signal, the calculation time interval of the adjustment amount is set. This is the process of setting.

The signal processing shown in the second embodiment is different from the signal processing shown in the first embodiment in that the operation time interval of the adjustment amount is set based on the fluctuation of the signal level of the sound source signal. Instead, it is a process of setting the adjustment amount to a predetermined value. That is, a noise signal is generated by subtracting the sound source signal from the sound collection signal for each predetermined frequency band,
Based on the noise signal, an adjustment amount for adjusting the gain level of each frequency band of the sound source signal and adjusting the signal level is calculated to process each level of the sound source signal, and the signal level of the sound source signal changes rapidly. When it is determined that the sound source signal has changed, the processing of each level of the sound source signal is performed by each predetermined adjustment amount.

The signal processing shown in the third embodiment is different from the signal processing shown in the first embodiment in that it is determined that the change in the signal level of the sound source signal in the second embodiment has changed abruptly. Sometimes, it is signal processing that performs processing of each level of the sound source signal with each predetermined adjustment amount.

As described above, according to the present embodiment, a sudden change in the sound source signal level is detected, and when the level of the sound source signal changes gradually, the operation time interval of the adjustment amount calculation is extended, and the sound source signal level is increased. If the level changes rapidly, change the adjustment amount in the adjustment amount calculation so that the adjustment amount is not too large, and perform signal processing without delay in sound quality and volume adjustment to shorten the operation time interval. Therefore, the sound source signal can be reproduced naturally in terms of audibility.

[Fifth Embodiment] FIG. 5 shows a fifth embodiment of an adaptive sound quality volume control device according to the present invention, and an acoustic device, a communication terminal device and an information terminal device using the adaptive sound quality volume control device. FIG.

This embodiment is an embodiment in which the adaptive sound quality volume control device in the first embodiment is applied to an audio device such as a car navigation system and a car stereo, and the other configurations are the same as those in the first embodiment. Therefore, the same members are denoted by the same reference numerals and description thereof will be omitted.

First, the configuration will be described.

The sound device 90 shown in FIG.
Microphone 36, CD playback unit 91 for playing a CD, FM tuner 92 for receiving radio, sound source selector 93 for selecting the output of CD playback unit 91 and the sound source signal output of FM tuner 92, and selection by sound source selector 93 Adaptive sound quality volume control device 20 for controlling the sound quality and volume of the selected sound source signal
0 and a user interface 94 for controlling the sound source selector 81 and the adaptive sound quality volume control device 200 according to a user's instruction.
And

The adaptive sound quality volume control device 200 has a frequency characteristic adjustment unit 32 for adjusting the gain of the sound source signal selected by the sound source selector 93 for each predetermined frequency by an equalizer or the like, and a volume. A volume adjuster 33 that adjusts the volume of the adjusted sound source signal, an amplifier 34 that amplifies the volume adjusted sound source signal to a predetermined signal level and outputs the amplified signal to the speaker 35, a sound source selector 93 and a microphone 36 Based on the signal, a control unit 40 that controls the frequency characteristic adjustment unit 32 and the volume adjustment unit 33,
A sound source signal level fluctuation detection unit 50 for detecting the signal level of the sound source signal output from the sound source selector 93, and an operation time for controlling the operation time interval of the control unit 40 based on the detection result of the sound source signal level fluctuation detection unit 50 And an interval calculation unit 51.

The user interface 94 controls the sound source selector 93 in accordance with a user's instruction to select the type of the sound source, that is, one of the CD reproducing unit 91 and the FM tuner 92. In addition, by controlling the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 according to a user's instruction, the gain level for each frequency band of the selected sound source signal and the output signal level of the sound source signal are controlled.

Specifically, this user interface
At 94, when the user instructs the selection of the sound source, information indicating that the type of the sound source is to be selected is transmitted to the sound source selector 81.
, And the sound source selector 93 selects either the output of the CD playback unit 91 or the output of the FM tuner 92. Further, under the control of the user interface 94, the frequency characteristic or the volume of the sound source signal is adjusted by the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 according to the user's preference.

As described above, according to the present embodiment, when the audio device 80 is loudspeaking a CD or the like, the signal level of the loudspeaking audio signal which takes the surrounding noise level into consideration is sharply increased. When the level of the sound source signal changes slowly, the operation time interval of the control unit 40 is increased, and when the sound source level changes rapidly, the operation time interval of the control unit 40 is detected. Can be shortened,
Adjustment of sound quality and volume can be performed appropriately without delay in adjustment of sound quality and volume.

As a result, even if the noise inside and outside the vehicle changes, the sound quality and volume of the voice loudspeaked from the speaker 35 change. For example, when the noise is loud, the volume becomes loud and the noise is loud. In this case, the volume is at an appropriate level, so that the operator can naturally hear the sound.

This embodiment is an acoustic device to which the adaptive sound quality volume control device of the first embodiment is applied.
The adaptive sound quality volume control device according to the second embodiment or the third embodiment may be applied.

[Sixth Embodiment] FIG. 6 shows a fifth embodiment of an adaptive sound quality volume control device according to the present invention, and an acoustic device, a communication terminal device and an information terminal device using the adaptive sound quality volume control device. FIG.

Note that this embodiment is an embodiment in which the adaptive sound quality volume control device in the first embodiment is applied to a communication terminal device such as a mobile phone, and other configurations are the same as those in the first embodiment. Therefore, the same members are denoted by the same reference numerals and description thereof will be omitted.

First, the configuration will be described.

The communication terminal device 100 shown in FIG.
5, a microphone 36, a transmitting / receiving unit 102 for receiving and transmitting a high-frequency signal via the antenna 101, and an adaptive sound quality volume control device 200 for controlling the sound quality and volume of the sound source signal selected by the transmitting / receiving unit 102. I have.

This adaptive sound quality volume control device 200 has a frequency characteristic adjusting unit 32 for adjusting the gain of each predetermined frequency of the audio signal (received signal) output from the transmitting / receiving unit 102 by an equalizer or the like, and a volume. Volume adjuster 33 that adjusts the volume of the audio signal whose frequency gain has been adjusted.
, An amplifier 34 for amplifying the volume-adjusted audio signal to a predetermined signal level, a speaker 35 for amplifying the amplified audio signal, and a microphone for inputting audio to be transmitted to the outside
36, a control unit 40 that controls the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 based on a change in the signal level of the signal output from the transmission and reception unit 102 and the microphone 36 and the audio signal output from the transmission and reception unit, A sound source signal level fluctuation detection unit 50 for detecting the signal level of the sound source signal output from the sound source selector 93, and an operation time for controlling the operation time interval of the control unit 40 based on the detection result of the sound source signal level fluctuation detection unit 50 And an interval calculation unit 51.

[0104] In the communication terminal device 100, the audio signal output from the microphone 36 is input to the transmitting / receiving section 102, and the input audio signal is transmitted to the outside via an antenna. It has become.

As described above, according to the present embodiment, when the voice signal received by the transmission / reception unit 102 is loudspeaked, the sudden change in the signal level of the voice signal is considered in consideration of the surrounding noise level. When the signal level of the audio signal changes gradually, the operation time interval of the control unit 40 is increased. When the signal level of the audio signal changes rapidly, the operation of the control unit 40 is performed. Since the time interval is shortened, the adjustment of the sound quality and the volume can be appropriately performed without delay in the adjustment of the sound quality and the volume.

As a result, even if the noise around the communication terminal device 100 changes, the sound quality and volume of the voice loudspeaked from the speaker 35 also change. When the volume is high and the noise is low, the volume is at an appropriate level.
It can be heard naturally from the speaker.

The present embodiment is an acoustic device to which the adaptive sound quality volume control device of the first embodiment is applied.
The adaptive sound quality volume control device according to the second embodiment or the third embodiment may be applied.

Seventh Embodiment FIG. 7 shows a fifth embodiment of an adaptive sound quality volume control device according to the present invention, and an audio device, a communication terminal device and an information terminal device using the adaptive sound quality volume control device. FIG.

This embodiment is an embodiment in which the adaptive sound quality volume control device in the first embodiment is applied to an information terminal device such as a personal computer, and other configurations are the same as those in the first embodiment. Therefore, the same members are denoted by the same reference numerals and description thereof will be omitted.

First, the configuration will be described.

The information terminal device 110 shown in FIG.
5, a microphone 36, a ROM 111 in which a boot program or the like is stored, a RAM 112 for a main memory, a display 114 via a driver 113, an input device 116 such as a keyboard, a touch panel or a mouse via the driver 115, A storage device 117 such as a memory card or a hard disk drive, a terminal adapter (hereinafter referred to as TA) 119 for communication via an interface (I / F) 118, and adaptive sound quality volume control via an interface (I / F) 120 The adaptive sound quality volume control device 200 includes a device 200 and a CPU 121 that controls each unit, and is connected to each unit via a bus.The adaptive sound quality volume control device 200 performs processing by a digital signal. D / A to convert to signal
It has a conversion unit 122.

The information terminal device 110 inputs sound source data stored in a storage device 117 such as a memory card or a hard disk to the adaptive sound quality volume control device 200 via the interface 120 as a sound source signal. The adaptive sound quality volume control device 200 controls the sound quality and the sound volume of the sound source signal by calculating the frequency characteristic and the operation of adjusting the sound volume of the input sound source signal, and calculating the adjustment amount.

The adaptive sound quality volume control device 200
A frequency characteristic adjustment unit 32 that adjusts a gain for each predetermined frequency of an audio signal (received signal) output from the transmission / reception unit 102 by an equalizer or the like; and a volume control unit that adjusts the volume of the audio signal whose frequency gain is adjusted. A volume adjusting unit 33 for adjusting the volume, an amplifier 34 for amplifying the volume-adjusted audio signal to a predetermined signal level, a speaker 35 for amplifying the amplified audio signal, and a microphone 36 for receiving an externally transmitted audio. A control unit 40 that controls the frequency characteristic adjustment unit 32 and the volume adjustment unit 33 based on changes in signal levels of the signal output from the transmission / reception unit 102 and the microphone 36 and the audio signal output from the transmission / reception unit, and a sound source selector A sound source signal level fluctuation detecting section 50 for detecting the signal level of the sound source signal output from 93, and a control section 40 based on the detection result of the sound source signal level fluctuation detecting section 50. Composed of operation time interval calculating unit 51 which controls the operation time interval.

As described above, according to the present embodiment, when the audio signal output from the storage device 117 is loudspeaked, the signal level of the audio signal suddenly changes in consideration of the surrounding noise level. When the signal level of the audio signal changes slowly, the operation time interval of the control unit 40 is increased. When the signal level of the audio signal changes rapidly, the operation of the control unit 40 is disabled. Since the time interval is shortened, the adjustment of the sound quality and the volume can be appropriately performed without delay in the adjustment of the sound quality and the volume.

As a result, even if the noise around the information terminal device 110 changes, the sound quality and volume of the sound loudspeaked from the speaker 35 also change. When the volume is high and the noise is low, the volume is at an appropriate level.
It can be heard naturally from the speaker.

The present embodiment is an acoustic device to which the adaptive sound quality volume control device in the first embodiment is applied.
The adaptive sound quality volume control device according to the second embodiment or the third embodiment may be applied.

Further, in this embodiment, the connection to the network is made by TA, but the connection may be made by a modem or a network interface card instead of TA.

[0118]

The sound quality volume control device according to the present invention can calculate the surrounding noise level at which the sound source signal is amplified based on the sound source signal and the collected sound signal. The signal level adjusting means and the frequency characteristic adjusting means can be controlled based on a change in the signal level of the detected sound source signal. As a result,
Even if the signal level of the sound source signal changes abruptly, the volume and frequency characteristics of the sound source signal can be adjusted in accordance with the change, and the sound source signal can be adjusted in consideration of the surrounding noise that amplifies the sound source signal. Since the volume and frequency characteristics can be adjusted, it is possible to output a sound source signal that can be heard naturally in terms of audibility.

[Brief description of the drawings]

FIG. 1 shows an adaptive sound quality volume control device according to the present invention, and
FIG. 2 is a diagram illustrating a first embodiment of an audio device, a communication terminal device, and an information terminal device using the adaptive sound quality volume control device, and illustrates a configuration of the adaptive sound quality volume control device.

FIG. 2 shows an adaptive sound quality volume control device according to the present invention, and
FIG. 4 is a diagram illustrating a second embodiment of an audio device, a communication terminal device, and an information terminal device using the adaptive sound quality volume control device, and is a diagram illustrating a configuration of the adaptive sound quality volume control device;

FIG. 3 shows an adaptive sound quality volume control device according to the present invention, and
FIG. 11 is a diagram illustrating a third embodiment of an audio device, a communication terminal device, and an information terminal device using the adaptive sound quality volume control device, and is a diagram illustrating a configuration of the adaptive sound quality volume control device;

FIG. 4 shows an adaptive sound quality volume control device according to the present invention, and
FIG. 10 is a diagram illustrating a fourth embodiment of an audio device, a communication terminal device, and an information terminal device using the adaptive sound quality volume control device, and is a diagram illustrating a configuration of the adaptive sound quality volume control device;

FIG. 5 is an adaptive sound quality volume control device according to the present invention, and
FIG. 13 is a diagram illustrating a fifth embodiment of an audio device, a communication terminal device, and an information terminal device using the adaptive sound quality volume control device, and is a diagram illustrating a configuration of the audio device.

FIG. 6 shows an adaptive sound quality volume control device according to the present invention, and
FIG. 13 is a diagram illustrating a sixth embodiment of an audio device, a communication terminal device, and an information terminal device using the adaptive sound quality volume control device, and is a diagram illustrating a configuration of the communication terminal device;

FIG. 7 shows an adaptive sound quality volume control device according to the present invention, and
FIG. 14 is a diagram illustrating a fifth embodiment of an audio device, a communication terminal device, and an information terminal device using the adaptive sound quality volume control device, and is a diagram illustrating a configuration of the information terminal device;

FIG. 8 is a block diagram showing a configuration of a conventional sound quality volume control device.

[Explanation of symbols]

 30, 60, 70, 80, 200 Sound quality volume control device 32 Frequency characteristic adjustment unit (frequency characteristic adjustment unit) 33 Signal level adjustment unit (signal level adjustment unit) 35 Speaker 36 Microphone 40 Control unit (control unit) 43 Noise signal calculation Section (noise level detecting means) 50 sound source level fluctuation detecting section (signal level detecting section) 51 operating time interval calculating section (setting means) 52 adjustment amount changing section (control means) 81, 85 A / D converting section (signal converting means) 93 Sound source selector (Sound source signal output means) 93 User interface (Operation means) 102 Transmitter / receiver (Transceiver means) 120 Interface

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D020 AC05 BB08 5J030 AA01 AA10 AB00 AC01 AC17 AC19 AC20 AC21 AC27 5J100 JA01 JA05 KA05 LA00 QA02 SA02 SA03 SA06

Claims (8)

[Claims] 1. A signal level adjusting means for adjusting a signal level of an input sound source signal; a frequency characteristic adjusting means for adjusting a frequency characteristic of the sound source signal; and a signal level for detecting a change in the signal level of the sound source signal. Detecting means; and a noise level detecting means for detecting a surrounding noise level at which the sound source signal is loudspeaked based on a sound collection signal collected by surrounding sounds at which the sound source signal is loudspeaked and the input sound source signal. And control means for controlling the signal level adjusting means and the frequency characteristic adjusting means based on a change in the signal level of the sound source signal detected by the signal level detecting means and the noise level detected by the noise level detecting means. An adaptive sound quality volume control device comprising: 2. The control means calculates an adjustment amount of the signal level adjusting means and the frequency characteristic adjusting means based on a signal level of the sound source signal and the noise level, and calculates the signal level adjusting means and the frequency characteristic. 2. The control device according to claim 1, further comprising a setting unit that controls each of the adjustment units and sets a calculation time interval of the adjustment amount based on a signal level of the sound source signal detected by the signal level detection unit. 3. Adaptive sound quality volume control device. 3. The signal level adjusting unit and the frequency characteristic adjusting unit calculate an adjustment amount of the signal level adjusting unit and the frequency characteristic adjusting unit based on a signal level of the sound source signal and the noise level. 2. The adaptation according to claim 1, wherein each of the adjusting units is controlled, and the adjustment amount is changed to a preset value based on the signal level of the sound source signal detected by the signal level detecting unit. Sound quality volume control device. 4. The control means calculates an adjustment amount of the signal level adjustment means and the frequency characteristic adjustment means based on a signal level of the sound source signal and the noise level, and calculates the signal level adjustment means and the frequency characteristic. Each controlling the adjusting means, and changing the adjustment amount to a preset value based on the signal level of the sound source signal detected by the signal level detecting means; and 2. The adaptive sound quality volume control device according to claim 1, further comprising setting means for setting a calculation time interval of the adjustment amount based on a signal level of the sound source signal. 5. A signal conversion means for converting the sound source signal and the sound collection signal into a digital signal, wherein the signal level and the frequency characteristic of the sound source signal are adjusted, the noise level is detected, and the signal level is adjusted. The adaptive sound quality volume control device according to any one of claims 1 to 4, wherein control of an adjustment unit and the frequency characteristic adjustment unit is processed by the digital signal. 6. An adaptive sound quality volume control device according to claim 1, further comprising: a sound source signal output unit for outputting a sound source signal to the adaptive sound quality volume control device; and an audio signal output from the adaptive sound quality volume control device. An audio device comprising: a speaker for loudspeaking; and operation means for operating the adaptive sound quality volume control device. 7. The adaptive sound quality volume control device according to claim 1, further comprising: receiving a signal including at least an audio signal, outputting the received audio signal to the adaptive sound quality volume control device, A communication terminal device comprising: a transmission / reception unit that transmits an audio signal input to a microphone included in a control device; and a speaker that loudspeaks the audio signal output from the adaptive sound quality volume control device. 8. An adaptive sound quality volume control device according to claim 1, further comprising: an interface for converting audio data into a predetermined signal and outputting the signal to the adaptive sound quality volume control device; An information terminal device comprising: a speaker that amplifies a voice signal.