Method for inducing brainwaves by sound and sound adjusting device

1. A brainwave induced sound generating method, applied to a sound adjusting device, the sound adjusting device having a processor, and being signally connected to a speaker device, the speaker device comprising a first speaker and a second speaker, the method comprising the steps of:

receiving a first channel input signal and a second channel input signal;

adjusting a volume gain of the first channel input signal to form a first channel output signal, wherein a formal of the volume gain of the first channel output signal is in a first wave format;

adjusting a volume gain of the second channel input signal to form a second channel output signal, wherein a formal of the volume gain of the second channel output signal is in a second wave format, wherein the type of the first wave format is the same as that of the second wave format; and

outputting the first channel output signal to a first speaker, and outputting the second channel output signal to the speaker device and playing through the second speaker, wherein a maximum of the volume gain of the first channel output signal is M1, a minimum of the volume gain of the first channel output signal is M2, and −200 dbFS≤M1−M2≤0 dbFS; the maximum of the volume gain of the second channel output signal is M1, the minimum of the volume gain of the second channel output signal is M2, and −200 dbFS≤M1−M2≤0 dbFS.

2. The brainwave induced sound generating method as claimed in claim 1 , wherein the method of adjusting the volume gain of the first channel input signal and the volume gain of the second channel input signal is: selecting a specific frequency band to generate brainwave induced sound for volume gain adjustment, where the specific frequency band includes the full frequency 20 Hz to 20000 Hz, the low frequency 20 Hz to 160 Hz, the intermediate frequency 160 Hz to 2560 Hz, the high frequency 2560 Hz to 20000 Hz or other specific frequency bands.

3. The brainwave induced sound generating method as claimed in claim 1 , wherein the first wave format and the second wave format comprise sine wave, triangle wave, square wave, trapezoidal wave, asymmetric wave and other wave formats.

4. The brainwave induced sound generating method as claimed in claim 1 , wherein there is a phase difference between the first wave format and the second wave format.

5. The brainwave induced sound generating method as claimed in claim 4 , wherein the phase difference is 0° to 360°.

6. The brainwave induced sound generating method as claimed in claim 4 , wherein the frequency range of the first wave format is between 0 Hz and 10000 Hz, and the frequency range of the second wave format is between 0 Hz and 10,000 Hz.

7. A sound adjusting device, which is signally connected with a speaker device, wherein the speaker device comprising a first speaker and a second speaker, the sound adjusting device comprising:

a signal input terminal, used for receiving first channel input signal and a second channel input signal;

a sound processing unit, which is electrically connected to the signal input terminal, the sound processing unit comprising:

a sound adjustment module, which is used for adjusting a volume gain of the first channel input signal to form a first channel output signal, wherein a formal of the volume gain of the first channel output signal is in a first wave format; the sound adjustment module adjusting a volume gain of the second channel input signal to form a second channel output signal, wherein a formal of the volume gain of the second channel output signal is in a second wave format, wherein the type of the first wave format is the same as that of the second wave format; and

a signal output terminal, which is electrically connected to the sound processing unit for outputting the first channel output signal to the speaker device and playing through the first speaker, and outputting the second channel output signal to the speaker device and playing through the second speaker, wherein a maximum of the volume gain of the first channel output signal is M1, a minimum of the volume gain of the first channel output signal is M2, and −200 dbFS≤M1−M2≤0 dbFS; the maximum of the volume gain of the second channel output signal is M1, the minimum of the volume gain of the second channel output signal is M2, and −200 dbFS≤M1−M2≤0 dbFS.

8. The sound adjusting device as claimed in claim 7 , wherein the method of adjusting the volume gain of the first channel input signal and the volume gain of the second channel input signal is: selecting a specific frequency band to generate brainwave induced sound for volume gain adjustment, such as selecting the full frequency 20 Hz to 20000 Hz, the low frequency 20 Hz to 160 Hz, the intermediate frequency 160 Hz to 2560 Hz, the high frequency 2560 Hz to 20000 Hz or other specific frequency bands.

9. The sound adjusting device as claimed in claim 7 , wherein the first wave format and the second wave format comprise sine wave, triangle wave, square wave, trapezoidal wave, asymmetric wave and other wave formats.

10. The sound adjusting device as claimed in claim 7 , wherein there is a phase difference between the first wave format and the second wave format.

11. The sound playing device as claimed in claim 10 , wherein the phase difference is 0° to 360°.

12. The sound adjusting device as claimed in claim 7 , wherein the frequency of the first wave format is between 0 Hz and 10,000 Hz, and the frequency of the second wave format is between 0 Hz and 10,000 Hz.