Audio signal generation method, audio playback device, computer readable storage medium and use thereof

Abstract

The present application provides an audio signal generation method, an audio playing device, a computer readable storage medium and its use. The audio signal generation method comprises: a plurality of base audio signals formed according to a plurality of sinusoidal signals with different frequencies; and mixing the base audio signals to obtain a nonlinear brain dynamic audio signal; wherein the frequencies are in a frequency range from 0 to 100 Hz, but not including 0 Hz.

Description

TECHNICAL FIELD

[0001] The present application relates to an audio generation technique, in particular to an audio signal generation method, an audio playback device, a computer readable storage medium and uses thereof. BACKGROUND

[0002] Although there are music therapy products that claim to help the development of the whole brain, they are only a mixture of natural music and light music, and have no solid theoretical basis, and the effect is also low. SUMMARY

[0003] An embodiment of the present application provides an audio signal generation method, comprising: a plurality of base audio formed according to a plurality of sinusoidal signals of different frequencies; and mixing the base audio to obtain a nonlinear brain power audio; wherein the frequencies are in a frequency range from 0 to 100 Hz excluding 0 Hz.

[0004] An embodiment of the present application provides an audio playback device, comprising a processor loaded with a computer program to execute the audio signal generation method described above.

[0005] An embodiment of the present application provides a computer readable storage medium storing a nonlinear brain power audio mixed from a plurality of base audio, wherein the frequencies of the base audio are in a frequency range from 0 to 100 Hz excluding 0 Hz.

[0006] An embodiment of the present application provides an audio playback device comprising the computer readable storage medium described above.

[0007] An embodiment of the present application provides a use of the computer readable storage medium described above for generating a sound therapy audio signal for stimulating the recovery of brain neurons.

[0008] The audio signal generation method, the audio playback device, the computer readable storage medium and the use thereof according to some embodiments of the present application can generate a nonlinear brain power audio, which has the effect of stimulating the recovery of brain neurons, and can be used for music therapy applications such as vision care, emotional relief, brain development and concentration improvement.

[0009] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments, but is not limited thereto. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 Flowchart of the audio signal generation method according to an embodiment of the present application.

[0011] Figure 2 Schematic diagram of the architecture of the audio playback device according to an embodiment of the present application.

[0012] Figure 3A flowchart of an effect evaluation method of a nonlinear brain power audio according to an embodiment of the present application.

[0013] Figure 4 A brain energy change graph according to an embodiment of the present application.

[0014] Figure 5 A brain synchronization rate index diagram according to an embodiment of the present application.

[0015] Figure 6 A flowchart of a frequency selection method of a base audio according to an embodiment of the present application.

[0016] Figure 7 A flowchart of an audio signal generation method according to another embodiment of the present application.

[0017] Wherein, the reference signs are:

[0018] 11: processor

[0019] 12: computer program

[0020] 13: storage unit

[0021] 14: audio output unit

[0022] S01, S02, S03, S04, S05, S06: steps

[0023] S21, S22, S31, S32, S33, S34: steps DETAILED DESCRIPTION

[0024] The structural principle and working principle of the present application will be described in detail below in combination with the drawings:

[0025] Referring to Figure 1 , a flowchart of an audio signal generation method according to an embodiment of the present application. First, a plurality of base audios formed according to a plurality of frequency sinusoidal signals (step S01). That is, each base audio is a sinusoidal signal of a different frequency. The frequency is in a frequency range of 0 to 100 Hz excluding 0 Hz. In some embodiments, the frequencies can be 20, 40, 60, and 80 Hz respectively. In other embodiments, the frequencies can be 30, 50, 70, and 90 Hz respectively. Then, in step S02, mixing these base audios can form a nonlinear brain power audio.

[0026] Referring to Figure 2This is a schematic diagram of the architecture of an audio playback device according to an embodiment of the present invention. The audio playback device may be, for example, a Bluetooth headset or a multimedia player, and includes a processor 11, a storage unit 13, and an audio output unit 14. The storage unit 13 stores a computer program 12, so that after the processor 11 loads the computer program 12, it executes the audio signal generation method of the present invention. The audio output unit 14 is used to output the generated audio signal, which may be output in the form of sound waves or electrical signals, depending on the type of audio output unit 14. In some embodiments, the audio output unit 14 is a speaker, a sound-emitting unit, or an audio source port, etc.

[0027] In some embodiments, processor 11 may be implemented as one or more processors capable of executing computer programs 12, such as microprocessors, microcontrollers, and systems-on-a-chip (SoCs).

[0028] In some embodiments, storage unit 13 may be, for example, a read-only memory (ROM), an electronically erasable programmable design ROM (EEPROM), a flash memory, or other non-volatile memory.

[0029] In some embodiments, the storage unit 13 is built into the processor 11.

[0030] Reference Figure 3 This is a flowchart illustrating an embodiment of the nonlinear brain-dynamic audio effect evaluation method of the present invention. First, nonlinear brain-dynamic audio is played to one or more subjects, while simultaneously measuring their electroencephalograms (EEGs) (step S21). Next, the brainwave synchronization rate and / or brain energy changes in the EEG are detected to objectively evaluate the brain's stimulation response to the nonlinear brain-dynamic audio (step S22). The brainwave signals may undergo preprocessing to filter out unwanted frequency signals, such as noise, eye movement signals, and heartbeat signals. In some embodiments, the electrodes used for the EEG include F4, F8, FT7, FC3, FCZ, FC4, FT8, T3, C3, CZ, C4, T4, TP7, CP3, CPZ, CP4, TP8, T5, P3, PZ, P4, T6, O1, OZ, and O2.

[0031] Reference Figure 4 This is a brain energy change diagram according to an embodiment of the present invention, with brainwave energy ranging from red to blue from high to low. The testing process can be divided into three stages. The first stage is a silent rest stage, in which no audio is output. The second stage is an audio stimulation stage, in which nonlinear brain-dynamic audio is continuously output. The third stage is a silent rest stage, also in which no audio is output. Each of these three stages lasts for a certain period of time, for example, the first stage lasts for 3 minutes, the second stage lasts for 12 minutes, and the third stage lasts for 3 minutes. Figure 4As shown, the first stage of brain wave energy is higher than the second and third stages of brain wave energy. It can be seen that the subject receives stimulation of the nonlinear brain dynamic audio and then the brain can rest and reduce operation, thereby playing a role in stimulating brain neurons to recover.

[0032] Referring to Figure 5 , the figure is a brain synchronization rate index diagram of an embodiment of the present application. The horizontal axis is time, and the vertical axis is the brain wave synchronization rate index factor. The left brain is shown in red lines, and the right brain is shown in blue lines. It can be seen that the brain wave synchronization rate index factors of the left and right brains in the second stage increase, and then decrease in the third stage, which proves that the stimulation of the nonlinear brain dynamic audio indeed has its effectiveness. The brain synchronization rate index can be calculated by the method described in the journal paper published by the inventor, Applied Mechanics and Materials Vol. 311 (2013) pp491-496.

[0033] Referring to Figure 6 , the figure is a frequency selection method flowchart of the base audio of an embodiment of the present application. First, a candidate frequency is selected in the aforementioned frequency range (step S31), for example, 20 Hz. Then, a candidate audio is formed according to the sine wave signal of the candidate frequency (step S32). Steps S33 and S34 are similar to steps S21 and S22, respectively, with the difference being that only the candidate audio of a single candidate frequency is used to find out which frequency or frequencies of the audio can cause an effect on the brain. In step S33, the candidate audio is played to one or more subjects, and the electroencephalogram of the subject is measured. Then, the brain wave synchronization rate or / and the brain energy change of the electroencephalogram is detected to select the candidate frequency that produces a reaction on the brain as the base audio (step S34). In this way, the base audio of the nonlinear brain wave zero dispersion matching can be found.

[0034] Referring to Figure 7 , the figure is a method flowchart of generating an audio signal of another embodiment of the present application. In some embodiments, after step S02, step S03 of mixing at least one noise audio into the nonlinear brain dynamic audio can also be performed. The noise audio can be, for example, Brown noise or pink noise. In this way, the nonlinear brain dynamic audio can be complicated to increase the difficulty of theft, and a low-frequency signal can be added to make the signal more natural.

[0035] In some embodiments, a chaotic encryption signal can also be superimposed on the nonlinear brain dynamic audio (step S04). In this way, the nonlinear brain dynamic audio can be hidden to avoid being stolen. The frequency of the chaotic encryption signal should avoid overlapping with the frequency of the aforementioned base audio.

[0036] In some embodiments, the nonlinear brain dynamic audio processed by the aforementioned steps S02-S04, processed by the aforementioned steps S02-S03 without the aforementioned step S04, processed by the aforementioned steps S02 and S04 without the aforementioned step S03, or obtained by the aforementioned step S02 without the aforementioned steps S03-S04, can be superimposed with a music signal (step S05) so that the subject will not feel bored when listening to the audio.

[0037] In some embodiments, the nonlinear brain dynamic audio can also be converted into a binaural signal (step S06), in which the left channel signal and the right channel signal are 180 degrees out of phase. If the audio is pirated, the complete audio cannot be obtained because the left and right channels are in phase and out of phase, which avoids being misused.

[0038] In some embodiments, the aforementioned audio signal generation method can be performed in advance, and the generated nonlinear brain dynamic audio can be stored in a computer readable storage medium. The computer readable storage medium can be, for example, the aforementioned storage unit 13, or other storage media independent of the aforementioned audio playback device (such as a USB flash disk, an optical disc, etc.). When the stored nonlinear brain dynamic audio is read and played, the sound therapy audio signal for stimulating brain neuron recovery can be generated.

[0039] In summary, the audio signal generation method, audio playback device, and computer readable storage medium of the present application can generate nonlinear brain dynamic audio, which has the effect of stimulating brain neuron recovery, and can be used for vision care, emotional relief, brain development, and music therapy applications to improve concentration.

[0040] Of course, the present application can also have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application. However, these corresponding changes and modifications should all belong to the protection scope of the claims attached to the present application.

Claims

1. A method for generating an audio signal, characterized in that, include: Multiple fundamental audio frequencies are formed based on sinusoidal signals of multiple frequencies; wherein these frequencies are located in a frequency range of 0 to 100 Hz, excluding 0 Hz, and these frequencies are selected through the following steps: Select a single candidate frequency within this frequency range; A candidate audio signal is formed based on the sinusoidal signal of the candidate frequency; The candidate audio was played to a subject while an electroencephalogram (EEG) was measured; and The brainwave synchronization rate and / or brain energy changes of the EEG are detected to select the candidate frequency that produces a response of increased brainwave synchronization rate and / or increased brain energy change as the base audio. and These basic audio elements are then combined into a non-linear brain-dynamic audio stream.

2. The audio signal generation method as described in claim 1, characterized in that, It also includes: mixing at least one noisy audio signal into the nonlinear neurodynamic audio.

3. The audio signal generation method as described in claim 2, characterized in that, The noise audio is Brown noise and / or pink noise.

4. The audio signal generation method as described in claim 1, characterized in that, Including: A chaotic encrypted signal is superimposed on the nonlinear neurodynamic audio.

5. The audio signal generation method as described in claim 1, characterized in that, Including: A music signal is superimposed onto the nonlinear brain-dynamic audio.

6. The audio signal generation method as described in claim 1, characterized in that, It also includes converting the nonlinear brain-powered audio into a two-channel signal, wherein the left channel signal and the right channel signal are 180 degrees out of phase.

7. An audio playback device, characterized in that, It includes a processor that loads a computer program to perform the audio signal generation method as described in any one of claims 1 to 6.

8. A computer-readable storage medium, characterized in that, A nonlinear neurodynamic audio stored in which multiple fundamental audio frequencies are mixed, wherein the nonlinear neurodynamic audio is generated by an audio signal generation method as described in any one of claims 1-6, and the frequencies of the fundamental audio frequencies are in a frequency range of 0 to 100 Hz but excluding 0 Hz.

9. An audio playback device, characterized in that, Includes the computer-readable storage medium as described in claim 8.

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