CN118413778A - Sound control device and method - Google Patents

Abstract

The invention discloses a sound regulating device and a sound regulating method, comprising a controller and an encoder, wherein the input end of the controller is connected with a control terminal and the input end of a sound source, the output end of the controller is connected with the encoder, and the output end of the encoder is connected with an air-guide earphone and/or a bone-guide earphone; the encoder comprises a DSP chip set, an AL sound channel and an AR sound channel corresponding to the air conduction earphone, and a BL sound channel and a BR sound channel corresponding to the bone conduction earphone, wherein the DSP chip set consists of a plurality of DSP chips, and each sound channel is independently controlled by one DSP chip; the hearing threshold data of the user can be obtained through the control terminal and input into the controller; the DSP chip can control the dynamic range of each sound channel to be matched with the hearing threshold data of a user; the encoder is capable of adjusting the binaural auditory dynamic range in real time based on the input sound pressure and the hearing threshold. Through the device and the method, the use of the air guide and bone guide earphone can be finely regulated and controlled, so that the sound source playing mode is changed, and richer perception experience is obtained.

Description

Sound control device and method

Technical Field

The present invention relates to the field of hearing equipment, and in particular to a sound control device and method.

Background technique

There are two ways for the human ear to listen to music. One is air conduction, which conducts sound through the air; the other is bone conduction, which conducts sound through the skull or dentary bones. In audiology, bone conduction headphones use a bone vibrator, which is a vibrator. The vibration of the vibrator causes the skull or dentary bones to vibrate and transmit sound. The bone conduction headphones currently sold on the market usually use dynamic speakers with larger diameters to increase the sound amplification intensity to achieve non-ear pressure sound transmission, but in essence, they still conduct sound through the air.

According to statistics, the incidence of hearing loss among the elderly population exceeds 50%. The hearing thresholds of each person's left and right ears are different. Hearing aids can compensate for the sound pressure of hearing thresholds in different frequency bands through fitting and increase the volume of hearing. However, they have the following defects: once the parameters are set, they are output according to a fixed program. This method cannot change auditory attention and reaction sensitivity. Slow listening reaction will reduce auditory discrimination and affect the improvement of individual status.

Summary of the invention

The purpose of the present invention is to provide a sound control device and method with controllable sound pressure, alternating playback, adjustable phase, and simultaneous output in air-bone conduction mode, which can at least solve one of the above problems.

According to one aspect of the present invention, there is provided a sound control device, comprising a controller and an encoder, wherein an input end of the controller is connected to a control terminal and a sound source input end, an output end of the controller is connected to the encoder, and an output end of the encoder is connected to an air conduction earphone and/or a bone conduction earphone;

The encoder includes a DSP chipset, AL channel and AR channel corresponding to air conduction headphones, and BL channel and BR channel corresponding to bone conduction headphones. The DSP chipset is composed of multiple DSP chips, and each channel is independently controlled by a DSP chip.

The controller includes a plurality of control units corresponding to the DSP chips;

The user's hearing threshold data can be obtained through the control terminal and input into the controller;

The DSP chip can control the dynamic range of each channel to match the user's hearing threshold data;

The encoder can adjust the binaural hearing dynamic range in real time according to the input sound pressure and hearing threshold;

The encoder includes an air conduction encoding mode and a bone conduction encoding mode. By starting the air conduction encoding mode and/or the bone conduction encoding mode, it is possible to revise the sensory level difference caused by individual left and right perception differences, correct the sensory level difference between synchronous or asynchronous stimulation of the left and right ears, and complete the bone conduction and/or air conduction sensory level difference compensation settings.

Therefore, the present invention provides a new sound control device, the working principle of which is: the controller controls the sound playback, which is divided into two channels of air conduction output and bone conduction output, controls the same piece of music to be output through the air conduction machine and bone conduction headphones at the same time, and the sound pressure when the air and bone conduction headphones play the audio is controllable, the playback is alternating, and the phase is adjustable. The encoder controls the air conduction and bone conduction output frequency responses to match the hearing thresholds of the left and right ears respectively to avoid overstimulation or understimulation. The encoder is provided with a DSP chipset, which can control the dynamic range of each channel to match the personal hearing to avoid overstimulation or understimulation; in addition, by starting the air conduction encoding mode and/or bone conduction encoding mode of the encoder, it is possible to revise the sensory level difference caused by the difference in personal left and right perception, correct the sensory level difference between synchronous or asynchronous stimulation of the left and right ears, and complete the bone conduction and/or air conduction sensory level difference compensation settings.

Through this device, it is possible to achieve fine control over the use of air conduction headphones and bone conduction headphones to change the way the sound source is played. When designing the acoustic device, the characteristics of spatial auditory perception are fully considered, and then by changing the way the sound source is played, a richer perceptual experience is obtained.

In some embodiments, after the sound source input plays audio, the controller distributes the played audio to the four channels of the encoder. The working program of the controller can be set through the control terminal. The controller can control the four channels to be output synchronously or asynchronously according to the set working program, and can control the sound pressure, phase, and loudness change frequency of each channel to be different.

In some implementations, the encoder parameter settings include frequency band division, bandwidth, compression ratio, and gain control.

In some embodiments, each control unit of the controller is provided with an FDRC algorithm, and the FDRC algorithm can be used to adjust the left and right ear sensory level difference caused by the bone conduction headphone output. The FDRC algorithm includes parameters such as frequency bandwidth selection, loudness compression ratio, loudness increment, and clock. These parameters are used to set and control the left and right bone conduction headphones. Therefore, due to the unilateral bone conduction through skull vibration conduction, binaural hearing perception is caused, and the left and right ears have different hearing states, and the left and right ears perceive differently due to the same sound source vibration. The bone conduction coding mode can revise this sensory level difference caused by the difference in personal left and right perception. Since bone conduction headphones have no inter-ear difference in hearing, the mutual influence between the two bone conduction output channels can be adjusted using the FDRC algorithm.

In some embodiments, the sound is outputted by the air conduction earphone and/or the bone conduction earphone so that the user has auditory perception, and then the controller calculates the sensory level SL and the sensory level difference. The controller can calculate the parameters outputted by the air conduction earphone or the bone conduction earphone using the sensory level difference, so that the binaural hearing perception is consistent. Therefore, the reverse control operation of the controller can be used to automatically set the left and right ear sensory level control parameters through the user feedback response, so that the binaural hearing perception is consistent.

In some embodiments, based on the sensory level SL and the sensory level difference, the sensory level difference compensation value is calculated in real time by the encoder to adjust the changes in binaural auditory perception differences caused by the large dynamic range of music when music is used as the input sound source.

In some implementations, a functional relationship between loudness compression cr and loudness increment Δp is provided in the DSP chip. Based on these functional relationships, the compensation adjustment of the left and right ear sensory level difference can be quickly completed by asynchronous binaural sound delivery. The loudness compression cr and the loudness increment Δp use a control accuracy of no more than 10% to finely control the sensory level difference under a high dynamic range loudness input state.

In some embodiments, under the control of the controller, the encoder can divide the input sound signal of the full frequency band into multiple frequency bands, and the encoder can calculate the SL difference compensation of a single frequency band according to the setting of the SL of the loudness of the full frequency band, and the SL difference compensation setting of the single frequency band can be adjusted. In this way, the loudness perception of each frequency band can be evenly distributed, and the SL enhancement or attenuation of a certain frequency band can be set separately to highlight the loudness of a specific channel.

According to another aspect of the present invention, there is also provided a sound control method, comprising the following steps:

S1, the input end of the controller communicates with the input end of the sound source, the output end communicates with the encoder, and the encoder is connected to the air conduction earphone and/or the bone conduction earphone;

In this step, the encoder includes a DSP chipset, an AL channel and an AR channel corresponding to an air conduction headset, and a BL channel and a BR channel corresponding to a bone conduction headset. The DSP chipset is composed of multiple DSP chips, and each channel is independently controlled by a DSP chip.

S2. Install application software on a computer to set the working program of the controller. Set parameters including parallel, alternating, alternating gain, phase difference, gain and phase tuning, and realize parameter setting and control of the controller through application software;

In this step, the controller includes a plurality of control units corresponding to the plurality of DSP chips;

S3. Play audio through the sound source input terminal, and the controller distributes the played audio to the four channels of the encoder. The controller can realize synchronous or asynchronous output of the four channels according to the set working program, and can realize different sound pressure, different phase, and different loudness change frequency of each channel;

S4, encoder has two modes: air conduction encoding mode and bone conduction encoding mode. The two modes can be mixed and stimulated in parallel. The encoder parameter settings include frequency band division, bandwidth, compression ratio, and gain control.

S5. By starting the above-mentioned air conduction coding mode and/or bone conduction coding mode, binaural sensory level difference compensation setting can be achieved to revise the binaural sensory level difference.

Beneficial effects of the present invention:

Through the device and method of the present invention, it is possible to achieve fine control over the use of air conduction and bone conduction headphones to change the way the sound source is played. When designing an acoustic device, the characteristics of spatial auditory perception are fully considered, and a richer perceptual experience is obtained by changing the way the sound source is played.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a simplified block diagram of a sound control device according to an embodiment of the present invention.

The reference numerals in FIG1 are: 1-control terminal; 2-sound source input terminal; 3-sound control device; 4-air conduction earphone; 5-bone conduction earphone; 21-dedicated software; 31-controller; 32-encoder; 311-control unit; 312-input terminal; 313-output terminal; 321-DSP chip.

Detailed ways

The present invention will be further described in detail below in conjunction with the specific drawings.

FIG. 1 schematically shows a sound control device according to an embodiment of the present invention.

As shown in FIG1 , the sound control device 3 includes a controller 31 and an encoder 32, wherein an input end 312 of the controller 31 is connected to the control terminal 1 and the sound source input end, an output end 313 of the controller 31 is connected to the encoder 32, and an output end 313 of the encoder 32 is connected to an air conduction earphone 4 and/or a bone conduction earphone 5;

The encoder 32 includes a DSP chipset, an AL channel and an AR channel corresponding to the air conduction earphone 4, and a BL channel and a BR channel corresponding to the bone conduction earphone 5. The DSP chipset is composed of a plurality of DSP chips, and each channel is independently controlled by a DSP chip 321.

The controller 31 includes a plurality of control units 311 corresponding to the DSP chips 321;

The user's hearing threshold data can be obtained through the control terminal 1 and input into the controller 31;

The DSP chip 321 can control the dynamic range of each channel to match the user's hearing threshold data;

The encoder 32 can adjust the binaural hearing dynamic range in real time according to the input sound pressure and the hearing threshold;

The encoder 32 includes an air conduction encoding mode and a bone conduction encoding mode. By starting the air conduction encoding mode and/or the bone conduction encoding mode, it is possible to revise the sensory level difference caused by the individual left and right perception differences, correct the sensory level difference between synchronous or asynchronous stimulation of the left and right ears, and complete the bone conduction and/or air conduction sensory level difference compensation settings.

The sound source input end of this embodiment can be an independent audio playback device, or an audio player set on the control terminal 1, and the control terminal 1 can be a smart phone, a computer, a television, etc. The control terminal 1 can obtain the hearing threshold data of the user by data import or scanning an audiogram. The air conduction earphone 4 and the bone conduction earphone 5 can be two independent earphones, or they can be air-bone conduction integrated earphones.

After the sound source input terminal plays the audio, the controller 31 distributes the played audio to the four channels of the encoder 32. The working program of the controller 31 can be set by the control terminal 1. The controller 31 can control the four channels to output synchronously or asynchronously according to the set working program, and can control the sound pressure, phase, and loudness change frequency of each channel to be different. For example: the four channels output the same audio, but the sound pressure, phase, and loudness change frequency of each channel are different. Controlled by the program set by the controller 31, relative to the listener, a song is played and output in four independent channels composed of two air conduction channels and two bone conduction channels. The listener can set different channels to be synchronized or asynchronous, or even one channel is output normally, and other channels can be played randomly.

The parameter settings of the encoder 32 include frequency band division, bandwidth, compression ratio, and gain control.

Each control unit 311 of the controller 31 is provided with an FDRC algorithm (FDRC is spelled as Frequency band Dynamic Range Compression, and its Chinese name is: dynamic range compression of a single frequency band). The FDRC algorithm can adjust the left and right ear sensory level difference caused by the output of the bone conduction earphone 5. The FDRC algorithm includes frequency bandwidth selection (optional bandwidth 125Hz, 62.5Hz), loudness compression ratio, loudness increment, clock and other parameters. These parameters are used to set and control the left and right ear bone conduction earphones 5. Therefore, due to the unilateral bone conduction through skull vibration conduction, binaural hearing perception is caused, and the left and right ears have different hearing states, and the left and right ears perceive differently due to the same sound source vibration. The bone conduction coding mode can revise this sensory level difference caused by the difference in personal left and right perception. Since the bone conduction earphone 5 has no inter-aural difference in hearing, the mutual influence between the two bone conduction output channels can be adjusted by using the FDRC algorithm.

The sound is outputted by the air conduction earphone 4 and/or the bone conduction earphone 5 so that the user has auditory perception, and then the controller 31 calculates the sensory level SL (sensation level refers to the difference between the subjective hearing threshold of individual monaural sound stimulation and the sound pressure level of the used stimulation sound) and the sensory level difference. The controller 31 can calculate the parameters outputted by the air conduction earphone 4 or the bone conduction earphone 5 by using the sensory level difference, so that the binaural auditory perception is consistent. For example: assuming that the better hearing ear is 20dBSL, if you want the worse hearing ear to reach 20dBSL, you need a higher volume. However, increasing the volume of the bone conduction earphone 5 of the worse ear will cause the better ear to eavesdrop, and the hearing sense of the two ears is different. It is necessary to set the output parameters of the better ear and the worse ear according to the sensory level SL difference, so that the binaural auditory perception is consistent. Therefore, the reverse control operation of the controller 31 can be used to automatically set the left and right ear sensory level control parameters through the user feedback response, so that the binaural auditory perception is consistent.

Based on the sensory level SL and the sensory level difference, the sensory level difference compensation value is calculated in real time by the encoder 32, which is used to adjust the changes in binaural auditory perception differences caused by the large dynamic range of music when music is used as the input sound source.

The DSP chip 321 is provided with a functional relationship between loudness compression cr and loudness increment Δp. Based on these functional relationships, the compensation adjustment of the left and right ear sensory level difference can be quickly completed by giving sound to both ears asynchronously. Among them, the loudness compression cr and the loudness increment Δp adopt a control accuracy of no more than 10% to finely control the sensory level difference under the high dynamic range loudness input state.

The encoder 32 adjusts the binaural auditory dynamic range in real time according to the input sound pressure and the hearing threshold. The smaller the hearing loss, the narrower the auditory perception dynamic range and the greater the binaural auditory perception difference.

The input and output communication between the encoder 32 and the controller 31 is carried out in two ways: digital signal and analog signal. The digital signal is converted into an analog signal output value and the sensory level SL is calibrated through the user's real ear measurement. The output sensory level SL calibration model is set by a large number of binaural hearing perception difference measurements. The sensory level difference adds a subjective factor, and the sensory level SL of different frequencies in the same ear is different.

Under the action of the controller 31, the full-band input sound signal is divided into multiple frequency bands through the encoder 32. The encoder 32 can calculate the SL difference compensation of a single frequency band according to the setting of the full-band loudness perception level SL, and the SL difference compensation setting of a single frequency band can be adjusted. In this way, the loudness perception of each frequency band can be evenly distributed, and the SL enhancement or attenuation of a certain frequency band can be set separately to highlight the loudness of a specific channel.

In the present invention, the time difference when the same sound source is played and output on different channels can be set according to the task and requirements.

When the same sound source is played, the output time of each channel can be set according to the task and needs. For example, when air conduction is playing, bone conduction can suddenly join the playback.

When the same sound source is played, the output sound pressure of each channel can be set according to the task and needs. For example, when four channels are played at the same time, air conduction can suddenly increase the sound pressure of a certain frequency band.

When the same sound source is played, the output of the four channels can remove the sound of a certain frequency band. It can be set according to the task and needs. For example, when the sound source is played, the air conduction and bone conduction can suddenly remove the sound of a certain frequency band and continue to play the sound source with the missing frequency band.

Therefore, the present invention provides a new sound control device 3, the working principle of which is as follows: the controller 31 controls the sound playback, which is divided into two channels of air conduction output and bone conduction output, and controls the same piece of music to be output through the air conduction machine and the bone conduction earphone 5 at the same time. The sound pressure when the air and bone conduction earphones 5 play the audio is controllable, the playback is alternating, and the phase is adjustable. The encoder 32 controls the air conduction and bone conduction output frequency responses to match the hearing thresholds of the left and right ears respectively to avoid overstimulation or understimulation. The encoder 32 is provided with a DSP chipset, which can control the dynamic range of each channel to match the personal hearing to avoid overstimulation or understimulation; in addition, by starting the air conduction encoding mode and/or the bone conduction encoding mode of the encoder 32, it is possible to revise the sensory level difference caused by the difference in personal left and right perception, correct the sensory level difference between the synchronous or asynchronous stimulation of the left and right ears, and complete the bone conduction and/or air conduction sensory level difference compensation settings.

Through this device, it is possible to achieve fine control over the use of the air conduction earphone 4 and the bone conduction earphone 5 to change the sound source playback mode. When designing the acoustic device, the characteristics of spatial auditory perception are fully considered, and then by changing the sound source playback mode, a richer perceptual experience is obtained.

According to another aspect of the present invention, a sound control method is also provided. The method is performed based on the above-mentioned sound control device 3 and specifically includes the following steps:

S1, the input terminal 312 of the controller 31 communicates with the sound source input terminal, the output terminal 313 communicates with the encoder 32, and the encoder 32 is connected to the air conduction earphone 4 and/or the bone conduction earphone 5;

In this step, the encoder 32 includes a DSP chipset, an AL channel and an AR channel corresponding to the air conduction earphone 4, and a BL channel and a BR channel corresponding to the bone conduction earphone 5. The DSP chipset is composed of a plurality of DSP chips, and each channel is independently controlled by a DSP chip 321.

S2. Setting the working procedure of the controller 31 by installing application software on a computer, setting parameters including parallel, alternating, alternating gain, phase difference, gain and phase tuning, and realizing parameter setting and control of the controller 31 by the application software;

In this step, the controller 31 includes a plurality of control units 311 corresponding to a plurality of DSP chips 321;

S3, playing audio through the sound source input terminal, the controller 31 distributes the played audio to the four channels of the encoder 32, and the controller 31 can realize synchronous or asynchronous output of the four channels according to the set working program and can realize different sound pressure, different phase, and different loudness change frequency of each channel;

S4, encoder 32 has two modes: air conduction encoding mode and bone conduction encoding mode. The two modes can be mixed and stimulated in parallel. The parameter settings of encoder 32 include frequency band division, bandwidth, compression ratio, and gain control;

S5. By starting the above-mentioned air conduction coding mode and/or bone conduction coding mode, binaural sensory level difference compensation setting can be achieved to revise the binaural sensory level difference.

Through the device and method of the present invention, it is possible to achieve fine control over the use of air conduction and bone conduction headphones 5 to change the sound source playback mode, fully consider the characteristics of spatial auditory perception when designing the acoustic device, and then obtain a richer perceptual experience by changing the sound source playback mode.

The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims (9)

1. A sound control device, characterized in that it comprises a controller (31) and an encoder (32), wherein an input end (312) of the controller (31) is connected to a control terminal (1) and a sound source input end (2), an output end (313) of the controller (31) is connected to the encoder (32), and an output end (313) of the encoder (32) is connected to an air conduction earphone (4) and/or a bone conduction earphone (5); The encoder (32) comprises a DSP chipset, an AL channel and an AR channel corresponding to an air conduction earphone (4), and a BL channel and a BR channel corresponding to a bone conduction earphone (5), the DSP chipset being composed of a plurality of DSP chips (321), and each channel being independently controlled by one of the DSP chips (321); The controller (31) includes a plurality of control units (311) corresponding to the DSP chip (321); The user's hearing threshold data can be obtained through the control terminal (1) and input into the controller (31); The DSP chip (321) can control the dynamic range of each channel to match the hearing threshold data of the user; The encoder (32) is capable of adjusting the binaural hearing dynamic range in real time according to the input sound pressure and the hearing threshold; The encoder (32) includes an air conduction encoding mode and a bone conduction encoding mode. By starting the air conduction encoding mode and/or the bone conduction encoding mode, the sensory level difference caused by the individual left and right perception difference can be revised, the sensory level difference between the left and right ear synchronous or asynchronous stimulation can be corrected, and the bone conduction and/or air conduction sensory level difference compensation setting can be completed. 2. The sound control device according to claim 1 is characterized in that after the sound source input terminal (2) plays audio, the controller (31) distributes the played audio to the four channels of the encoder (32), and the working program of the controller (31) can be set through the control terminal (1). The controller (31) can control the four channels to output synchronously or asynchronously according to the set working program and can control the sound pressure, phase and loudness change frequency of each channel to be different. 3. The sound control device according to claim 1 is characterized in that the parameter settings of the encoder (32) include frequency band division, bandwidth, compression ratio, and gain control. 4. The sound control device according to claim 1 is characterized in that each control unit (311) of the controller (31) is provided with an FDRC algorithm, through which the left and right ear sensory level difference caused by the output of the bone conduction earphone (5) can be adjusted, and the FDRC algorithm includes parameters such as frequency bandwidth selection, loudness compression ratio, loudness increment, and clock, and these parameter settings are used to realize the control of the left and right ear bone conduction earphones (5). 5. The sound control device according to claim 1 is characterized in that the sound is outputted by the air conduction earphone (4) and/or the bone conduction earphone (5) so that the user has auditory perception, and then the sensory level SL and the sensory level difference are calculated by the controller (31). The controller (31) can calculate the parameters outputted by the air conduction earphone (4) or the bone conduction earphone (5) by using the sensory level difference, so that the auditory perception of both ears is consistent. 6. The sound control device according to claim 5 is characterized in that, based on the sensory level SL and the sensory level difference, the sensory level difference compensation value is calculated in real time by the encoder (32) to adjust the changes in binaural auditory perception differences caused by the large dynamic range of music when music is used as the input sound source. 7. The sound control device according to claim 6 is characterized in that the DSP chip (321) is provided with a functional relationship between loudness compression cr and loudness increment Δp, and based on these functional relationships, compensation adjustment of the left and right ear sensory level difference is completed by asynchronous binaural sound supply. 8. The sound control device according to claim 7 is characterized in that, under the action of the controller (31), the encoder (32) can divide the input sound signal of the full-band into multiple frequency bands, and the encoder (32) can calculate the perception level SL difference compensation of a single frequency band according to the setting of the full-band loudness perception level SL, and the perception level SL difference compensation setting of a single frequency band can be adjusted. 9. A sound control method, characterized in that it comprises the following steps: S1, the input end (312) of the controller (31) communicates with the sound source input end (2), the output end (313) communicates with the encoder (32), and the encoder (32) is connected to the air conduction earphone (4) and/or the bone conduction earphone (5); In this step, the encoder (32) includes a DSP chipset, an AL channel and an AR channel corresponding to the air conduction earphone (4), and a BL channel and a BR channel corresponding to the bone conduction earphone (5), the DSP chipset is composed of a plurality of DSP chips (321), and each channel is independently controlled by a DSP chip (321); S2, installing application software on a computer to set the working program of the controller (31), setting parameters including parallelism, alternation, alternating gain, phase difference, gain and phase tuning, and realizing parameter setting and control of the controller (31) through the application software; In this step, the controller (31) includes a plurality of control units (311) corresponding to the plurality of DSP chips (321); S3, playing audio through the sound source input terminal (2), and the controller (31) distributing the played audio to the four channels of the encoder (32), and the controller (31) can realize synchronous or asynchronous output of the four channels according to the set working program, and can realize different sound pressure, different phase, and different loudness change frequency of each channel; S4, the encoder (32) is divided into two modes: air conduction encoding mode and bone conduction encoding mode. The two modes can be mixed and stimulated in parallel. The parameter settings of the encoder (32) include frequency band division, bandwidth, compression ratio, and gain control; S5. By starting the above-mentioned air conduction coding mode and/or bone conduction coding mode, binaural sensory level difference compensation setting can be achieved to revise the binaural sensory level difference.