JPH03210274A - Stress relieving device by high-frequency natural sound - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stress relief device that uses high-frequency natural sounds to relieve stress, increase work efficiency, relax, treat mental illness, and the like.

[Conventional technology]

In factories, background music is emitted from speakers to provide comfort to workers' mental states and improve work efficiency, and music is played to aid in the treatment of mental illness. There is.

[The invention tries to solve the problem! IB]

All of the above-mentioned conventional methods are based on audible sounds, but recently, ultrasonic waves of 20 KHz or more included in sounds in the natural world, such as the sound of rustling leaves, can be heard even if they cannot be heard by the ear, and ultrasonic waves of up to 40 KHz can be heard. Ultrasound has also been found to be effective in relieving stress and treating modern illnesses such as psychosomatic disorders.

On the other hand, general-purpose digital recording and playback devices can only record and play back sounds at a frequency of several H2 to 22KHz at most due to the sampling frequency, so this ￥tWt records and plays back ultrasonic waves in natural sounds that exist in the natural world. It was impossible, and there was no device that attempted to record and reproduce only ultrasonic waves that exist in nature.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a general-purpose digital recording and playback device that has characteristics that allow recording and playback with a good signal-to-noise ratio without causing distortion. It is an object of the present invention to provide a stress relaxation device that records natural sounds of several tens of KHz to 40 KHz and plays them back.

[Means to solve the problem]

The feature of the present invention is that the frequency range is from several tens of KHz to 40KH.
an AD converter into which an output signal from a microphone that picks up the natural sound of z is input; a digital frequency divider that reduces the frequency of the output signal of the AD converter by one octave;
A recording medium that records and reproduces the output signal of a digital frequency divider in analog or digital format, a digital frequency multiplier that multiplies the read signal from the recording medium by one octave, and a digital frequency multiplier A stress relieving device using high-frequency natural sounds, comprising: a DA converter that receives an output signal of The reason lies in the fact that it has been constructed.

[Effect]

Natural sounds of several tens of KHz to 40 KH2 are collected by a microphone, converted into a digital signal, and then reduced by one octave by a digital frequency divider and recorded on a recording medium. The recorded natural sound is played back, multiplied by one octave using a digital frequency multiplier, converted to an analog signal, and then emitted as natural sound at a frequency of several tens of KHz to 40 KHz from an electroacoustic transducer. .

〔Example〕

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

FIG. 1 shows a circuit configuration diagram of an embodiment of the present invention, and the reference numeral 11 in the figure indicates audible sounds ranging from several tens of KHz to 20 KHz or higher, which is included in sounds generated by leaf shedding, for example.
An AD converter 2 that converts an analog signal from a high-performance microphone l that can pick up natural sounds including ultrasonic waves of 0 KHz into digital signals, and an AD converter 2 that converts an analog signal into a digital signal, and its
In order to reduce the KHz natural sound signal to one octave, that is, to divide the frequency into an audible sound signal from several tens of KHz to 20 KH2, and to enable recording in the recording/reproducing section 5 described later, the digital signal is converted into a flip-flop, for example. This recording signal processing system includes a digital-to-digital conversion type frequency divider 3 that converts the signal into a 1/2 frequency signal, and a DA converter 4 that converts this signal into an analog signal. This DA converter 4 is connected to a recording/reproducing section 5 having a magnetic tape for recording analog signals to be outputted from the recording/reproducing section 5.

On the other hand, reference numeral 12 denotes an AD converter 6 that converts the analog signal read out from the recording/reproducing section 5 into a digital signal;
This digital signal is multiplied by one octave, that is, several tens of KH.
In order to double the natural sound signal from z to 40KHz, for example, divide the input digital signal into two, input one of them directly to the OR gate, and use a delay that has a delay time for the other to obtain the doubled frequency. A digital-to-digital conversion type frequency multiplier 7 that outputs a double frequency signal by delaying it through a circuit and manually inputting the OR gate, and DAf that converts this double frequency output signal into an analog signal.
: This is a reproduction No. 18 processing system consisting of a converter H8.

This DA converter 8 is connected to a speaker 10 whose output signal is amplified by an amplifier 9 and is capable of emitting natural sounds including audible sounds and ultrasonic waves of several tens of KHz'p) to 40 KHz.

To explain the operation of the device configured in this way, natural sound signals including audible sounds of several tens of KHz to 40 KHz and ultrasonic waves collected by the microphone 1 are converted into digital signals by the AD converter 2, and then frequency It is input to the separator 3 and is reduced by one octave, and the frequency ranges from several tens of KHz to 20KH.
After converting it into a z signal, it is input to the DA converter 4, where it is converted into an analog signal and recorded on a magnetic tape in the recording/reproducing section 5.

During playback, an analog signal of several tens of KHz to 20 KHz read from the magnetic tape in the recording/reproducing section 5 is input to the AD converter 6, and this digital signal is multiplied by one octave by the frequency multiplier 7 to produce an 11 insignificant number. A digital signal of 10 KHz to 40 KHz is input to the DA converter 8, and the converted analog signal is input to the speaker 10 via the amplifier 9 to produce audible and Emit natural sounds including sound waves.

In addition, the recording and reproducing section is not limited to analog recording and reproducing methods, and not only is it possible to apply a digital audio recording method that enables digital recording and reproducing, but also a recording and reproducing method using an optical disk can be used. Of course it is possible.

〔Effect of the invention〕

As described above, according to the present invention, the frequency range of several tens of KHz to 4
An AD converter into which an output signal from a microphone that picks up natural sound at 0 KHz is input, a digital frequency divider that reduces the frequency of the output signal of the AD converter by one octave, and a digital frequency divider. A recording medium that records and reproduces the output signal in analog or digital format, a digital frequency multiplier that multiplies the read signal from the recording medium by one octave, and the output signal of the digital frequency multiplier is input. The structure includes a DA converter and an electroacoustic transducer that emits the output signal of the DA converter as a natural sound having a frequency of several tens of KHz to 40 KHz. Not only is it possible to reproduce high-frequency natural sounds with a certain frequency and use them for stress relief, etc. (Since the frequency divider and frequency multiplier are digital, the high-frequency natural sound input signal can be reduced by one octave. This has excellent effects in that it can be recorded on a recording medium as an audible sound signal by simply doing this, and it can be easily converted into a high-frequency natural sound for stress relief by simply multiplying it by one octave.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment of the apparatus of the present invention. 11. Microphone, 2 and 6... AD converter, 4 and 3 = DA converter, 3... Digital frequency divider, 7
...Digital frequency multiplier, 5...Recording and reproducing section, 1
0...Speaker, 11. . Recorded signal processing system, 12... Reproduction signal processing system, application
People Shimizu Corporation

Claims (1)

[Claims] an AD converter into which an output signal from a microphone that picks up natural sounds in the range of 40 KHz to 40 KHz is input; a digital frequency divider that reduces the frequency of the output signal of the AD converter by one octave; A recording medium for recording and reproducing the output signal of the frequency divider in analog or digital format, a digital frequency multiplier for multiplying the read signal from the recording medium by one octave, and the above-mentioned digital frequency multiplier. The output signal of the above DA converter is input to the DA converter, and the output signal of the above DA converter is
1. A stress relief device using high-frequency natural sounds, comprising an electroacoustic transducer that emits natural sounds having a frequency of Hz to 40 KHz.