WO2019085746A1 - 一种利于脑力增强的音乐文件的制作方法 - Google Patents

一种利于脑力增强的音乐文件的制作方法 Download PDF

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WO2019085746A1
WO2019085746A1 PCT/CN2018/110504 CN2018110504W WO2019085746A1 WO 2019085746 A1 WO2019085746 A1 WO 2019085746A1 CN 2018110504 W CN2018110504 W CN 2018110504W WO 2019085746 A1 WO2019085746 A1 WO 2019085746A1
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synthesized
signal
music
frequency
harmonic
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陈锐斐
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陈锐斐
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/369—Electroencephalography [EEG]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7235—Details of waveform analysis
    • A61B5/7253—Details of waveform analysis characterised by using transforms
    • A61B5/7257—Details of waveform analysis characterised by using transforms using Fourier transforms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/44—Tuning means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
    • A61M2021/0005—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus
    • A61M2021/0027—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus by the hearing sense

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  • the invention relates to the technical field of brain development, and in particular to a method for manufacturing a music file which is beneficial to brain power enhancement.
  • the human brain has been an important area of unremitting research by scientists. According to the latest research, the main function of the brain is to analyze the output samples. The samples can illuminate the thalamus of the thalamus. Brain scientists recognize that the human brain has a lot of potential to dig. Although normal human brain cells are about 14 billion to 15 billion, only less than 10% have been exploited, and most of the rest are in a dormant state for a long time. More research shows that 98.5% of cells are dormant, even Some experts believe that only 1% participate in functional activities of the brain. And after the age of 30, the brain cells are dying every day at a rate of 100,000. Although this is insignificant for the brain's 15 billion brain cells, if the death is a developed, functional brain cell, it will inevitably Affects brain power and makes people dull and dull.
  • the present invention provides a method for making a music file that is beneficial to brain power enhancement.
  • the technical solution adopted by the present invention provides a method for manufacturing a music file for enhancing brain power, comprising the following steps: S101. Acquiring an analog signal of a brain wave; S102. Splitting the brain wave analog signal into several by Fourier transform a harmonic signal, and selecting at least one harmonic signal to be synthesized with a frequency between 4 and 12 Hz; S103. superimposing the selected harmonic signal to be synthesized with a music analog signal through a music synthesizer to obtain a composite Analog signal; S104. Perform analog-to-digital conversion on the synthesized analog signal to generate a target music file.
  • the brain wave analog signal of the target listener is collected by the brain wave sensor.
  • a first to-be-synthesized harmonic signal having a frequency between 4 and 8 Hz selecting a second to-be-synthesized harmonic signal having a frequency between 8 and 12 Hz, and/or a frequency having a frequency between 4 and 12 Hz
  • the three to-be-synthesized harmonic signals are different in frequency of the first to-be-synthesized harmonic signal, the second to-be-synthesized harmonic signal, and the third to-be-synthesized harmonic signal.
  • the first to-be-synthesized harmonic signal having a frequency between 4 and 8 Hz is selected in the step S102, in the process of performing signal superposition in the step S103, along with the time of the music analog signal Progress, gradually reducing the frequency of the first harmonic signal to be synthesized.
  • the second harmonic to be synthesized is maintained during the signal superimposition in the step S103.
  • the frequency of the signal does not change.
  • a pair of fourth to-be-synthesized harmonic signals having a frequency between 4 and 12 Hz are also selected in the step S102, and In the process of performing signal superposition in step S103, the two fourth to-be-synthesized harmonic signals are respectively superimposed with the music analog signal of the left channel and the music analog signal of the right channel to obtain a synthetic simulation with left and right two channels. signal.
  • the instantaneous frequency of the fourth harmonic signal to be synthesized corresponding to the channel is synchronously raised and lowered with the instantaneous frequency of the music analog signal, so that the two fourth to be synthesized
  • the instantaneous frequency change relationship of the harmonic signals changes with each other.
  • the instantaneous amplitude of the harmonic signal to be synthesized is synchronously raised and lowered with the instantaneous amplitude of the music analog signal.
  • the method for manufacturing a music file that is beneficial to brain power enhancement has the following beneficial effects: (1)
  • the music file created by the invention can make the listener listen to music. It can input low-frequency brain electrical harmonics into the human ear and brain in the form of sound waves, which can resonate with brain cells, keep brain cells in motion and active state, improve brain movement function, and enhance mental power through physical means.
  • the method for producing the music file also has the advantages of high purpose, high efficiency and easy realization, and is convenient for practical promotion and application.
  • FIG. 1 is a schematic flow chart of a method for manufacturing a music file provided by the present invention.
  • FIG. 2 is a diagram showing an example of waveform comparison of a music signal to be synthesized, a harmonic signal to be synthesized, and a composite analog signal in the process of producing a music file provided by the present invention.
  • FIG. 1 is a schematic flow chart showing a method for fabricating a music file provided by the present invention
  • FIG. 2 is a view showing waveform comparison of a music signal to be synthesized, a harmonic signal to be synthesized, and a synthesized analog signal in the process of producing a music file provided by the present invention. sample graph.
  • the method for manufacturing the music file for brain power enhancement provided by the embodiment includes the following steps.
  • the step S101 in order to ensure that the final low-frequency sound wave (ie, the sound wave component corresponding to the music signal to be synthesized and corresponding to the brain electrical harmonic) can resonate with the brain cells of the listener, specifically includes The following steps: collecting the brain wave analog signal of the target listener through the brain wave sensor.
  • the brain wave sensor is an existing device, and may be, but not limited to, a brain wave collector used in a nuclear magnetic resonance instrument.
  • S102 Split the brain wave analog signal into several harmonic signals by Fourier transform, and select at least one harmonic signal to be synthesized with a frequency between 4 and 12 Hz.
  • the Fourier transform is an existing algorithm, and at the same time, the first harmonic signal to be synthesized with a frequency between 4 and 8 Hz and the second harmonic to be synthesized with a frequency between 8 and 12 Hz are selected.
  • a third to-be-synthesized harmonic signal having a signal and/or frequency between 4 and 12 Hz, a frequency of the first to-be-synthesized harmonic signal, the second to-be-synthesized harmonic signal, and the third to-be-synthesized harmonic signal They are all different.
  • playing the low-frequency sound wave corresponding to the first harmonic signal to be synthesized can facilitate the relaxation of the brain; and playing the low-frequency sound wave corresponding to the second harmonic signal to be synthesized can facilitate the activity of the right brain cells and enhance the memory; Playing the low frequency sound wave corresponding to the third harmonic signal to be synthesized can facilitate cerebellar cell activity and enhance the sensing ability. Therefore, through the music synthesis of them, the purpose of enhancing long-term memory and enhancing perception can be realized physically.
  • the music analog signal to be synthesized is a music analog signal having left and right two channels
  • a pair of fourth harmonic signals to be synthesized having a frequency between 4 and 12 Hz is also selected, and the fourth to be synthesized is played through
  • the low-frequency sound waves corresponding to the harmonic signals can help balance the left and right brains and enhance the concentration ability.
  • the selected harmonic signal to be synthesized is superimposed with the music analog signal by a music synthesizer to obtain a synthesized analog signal.
  • the frequency of the music analog signal is mainly between 100 Hz and 20 kHz, and it can be either a mono signal or a signal with left and right two channels (the music file produced in this case, Need to be listened to by headphones and other devices).
  • the music analog signal of the right channel is superimposed on the signal to obtain a composite analog signal having left and right two channels.
  • the two fourth to-be-synthesized harmonic signals with the instantaneous frequency of the music analog signal, synchronously raising and lowering the instantaneous frequency of the fourth harmonic signal to be synthesized corresponding to the channel, so that the two fourth to-be-synthesized harmonics
  • the instantaneous frequency change of the signal is related to each other.
  • the listener can enter the low-frequency brain electrical harmonics into the human ear and the brain in the form of sound waves during the listening to the music, thereby resonating with the brain cells.
  • the effect is that the brain cells are always in motion and active, improve brain function, and achieve physical purpose, enhance mental power, enhance attention, enhance long-term memory and enhance perception.
  • the method for manufacturing the music file has the advantages of high purpose, high efficiency, and easy implementation, and is convenient for practical promotion and application.
  • the method for creating a music file for enhancing brain power has the following beneficial effects: (1)
  • the music file created by the invention can enable the listener to listen to music during the process.
  • the low-frequency brain electrical harmonics enter the human ear and the brain in the form of sound waves, which can resonate with the brain cells, keep the brain cells in motion and active, improve the brain movement function, and enhance the brain power and enhance through physical means. Attention, enhance long-term memory and enhance the ability of perception;
  • the method of making the music file also has the advantages of high purpose, high efficiency and easy realization, which is convenient for practical promotion and application.
  • the present invention can be preferably carried out. It will be apparent to those skilled in the art, in accordance with the teachings of the present invention, that different forms of music-enhanced music files can be created without the need for creative labor. Variations, modifications, substitutions, integrations and variations of these embodiments are still within the scope of the invention without departing from the spirit and scope of the invention.

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Abstract

一种利于脑力增强的音乐文件的制作方法。所制作的音乐文件可以使受听者在听音乐的过程中，能够将低频率的脑电谐波以声波形式进入人耳及大脑中，进而可对大脑细胞产生共鸣效果，让脑细胞一直处于运动和活跃状态，提升脑运动机能，实现通过物理方式增强脑力、提升注意力、增强长期记忆力和增强感知能力的目的。此外，该制作方法还具有目的性强、效率高和易于实现等优点，便于实际推广和应用。

Description

一种利于脑力增强的音乐文件的制作方法 技术领域
本发明涉及脑力开发技术领域，具体地，涉及一种利于脑力增强的音乐文件的制作方法。
背景技术
多少年来，人类的大脑一直是科学家们不懈研究的一个重要领域。根据最新研究，大脑的主要功能是分析产出样本，样本可以点亮丘脑的丘觉前，脑科学家们公认，人的大脑还有大量的潜力可挖。虽然正常人的脑细胞约140亿～150亿个，但是只有不足10％被开发利用，其余大部份都长期处在休眠状态，更有研究统计认为有98.5％的细胞是处于休眠状态，甚至有专家认为只有1％参加大脑的功能活动。而人在30岁以后每天脑细胞是以十万个的速度在死亡，虽然这对大脑150亿脑细胞来说是微不足道的，但如果死亡的是已开发的、有功能的脑细胞，必然会影响脑力效能，使人迟钝呆板。
为了增强脑力，现有提出了一种采用播放双声道音乐的方式，即通过左右耳不同频率的音乐产生微分频率，进而提升脑力，但是这种方式的效率不高，有待改进。
发明内容
针对前述现有技术对脑力增强效率不高的问题，本发明提供了一种利于脑力增强的音乐文件的制作方法。
本发明采用的技术方案,提供了一种利于脑力增强的音乐文件的制作方法，包括如下步骤：S101.获取脑电波模拟信号；S102.通过傅立叶变换将所述脑电波模拟信号拆分成若干个谐波信号，并从中选取至少一个频率介于4～12Hz之间的待合成谐波信号；S103.通过音乐合成器将选取的所述待合成谐波信号与音乐模拟信号进行信号叠加，得到合成模拟信号；S104.对所述合成模拟信号进行模数转换，生成目标音乐文件。
优化的，在所述步骤S101中包括如下步骤：通过脑电波传感器采集目标听者的脑电波模拟信号。
优化的，在所述步骤S102中选择频率介于4～8Hz的第一待合成谐波信号、频率介于8～12Hz的第二待合成谐波信号和/或频率介于4～12Hz的第三待合成谐波信号，所述第一待合成谐波信号、所述第二待合成谐波信号和所述第三待合成谐波信号的频率均不相同。
进一步优化的，若在所述步骤S102中选择有频率介于4～8Hz的第一待合成谐波信号，则在所述步骤S103进行信号叠加的过程中，随着所述音乐模拟信号的时间进度，逐渐降低所述第一待合成谐波信号的频率。
进一步优化的，若在所述步骤S102中选择有频率介于8～12Hz的第二待合成谐波信号，则在所述步骤S103进行信号叠加的过程中，维持所述第二待合成谐波信号的频率不变。
进一步优化的，当所述音乐模拟信号为具有左右双声道的音乐模拟信号时，则在所述步骤S102中还选择一对频率介于4～12Hz的第四待合成谐波信号，并在所述步骤S103进行信号叠加的过程中，将两第四待合成谐波信号分别与左声道的音乐模拟信号和右声道的音乐模拟信号进行信号叠加，得到具有左右双声道的合成模拟信号。详细优化的，在所述步骤S103进行信号叠加的过程中，随着所述音乐模拟信号的即时频率，同步升降对应声道的第四待合成谐波信号的即时频率，使两第四待合成谐波信号的即时频率变化关系互为此降彼升的变化关系。
优化的，在所述步骤S103进行信号叠加的过程中，随着所述音乐模拟信号的即时幅度，同步升降所述待合成谐波信号的即时幅度。
综上，采用本发明所提供的一种利于脑力增强的音乐文件的制作方法，具有如下有益效果：(1)通过本发明创造所制作的音乐文件，可以使受听者在听音乐的过程中，能够将低频率的脑电谐波以声波形式进入人耳及大脑中，进而可对大脑细胞产生共鸣效果，让脑细胞一直处于运动和活跃状态，提升脑运动机能，实现通过物理方式增强脑 力、提升注意力、增强长期记忆力和增强感知能力的目的；(2)所述音乐文件的制作方法还具有目的性强、效率高和易于实现等优点，便于实际推广和应用。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明提供的音乐文件的制作方法流程示意图。
图2是本发明提供的在音乐文件的制作过程中待合成音乐信号、待合成谐波信号和合成模拟信号的波形对比示例图。
具体实施方式
以下将参照附图，通过实施例方式详细地描述本发明提供的利于脑力增强的音乐文件的制作方法。在此需要说明的是，对于这些实施例方式的说明用于帮助理解本发明，但并不构成对本发明的限定。
本文中术语“和/或”，仅仅是一种描述绑定对象的绑定关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，单独存在B，同时存在A和B三种情况，本文中术语“/和”是描述另一种绑定对象关系，表示可以存在两种关系，例如，A/和B，可以表示：单独存在A，单独存在A和B两种情况，另外，本文中字符“/”，一般表示前后绑定对象是一种“或”关系。
实施例一
图1示出了本发明提供的音乐文件的制作方法流程示意图，图2示出了本发明提供的在音乐文件的制作过程中待合成音乐信号、待合成谐波信号和合成模拟信号的波形对比示例图。
本实施例提供的所述利于脑力增强的音乐文件的制作方法，包 括如下步骤。
S101.获取脑电波模拟信号。
在所述步骤S101中，为了确保最终的低频声波(即相对于待合成音乐信号而言的且与脑电谐波对应的声波成份)能够对受听者的大脑细胞产生共鸣效果，则具体包括如下步骤：通过脑电波传感器采集目标听者的脑电波模拟信号。其中，所述脑电波传感器为现有设备，可以但不限于为在核磁共振仪中所采用的脑电波采集器。
S102.通过傅立叶变换将所述脑电波模拟信号拆分成若干个谐波信号，并从中选取至少一个频率介于4～12Hz之间的待合成谐波信号。
在所述步骤S102中，所述傅立叶变换为现有算法，同时具体的，可选择频率介于4～8Hz的第一待合成谐波信号、频率介于8～12Hz的第二待合成谐波信号和/或频率介于4～12Hz的第三待合成谐波信号，所述第一待合成谐波信号、所述第二待合成谐波信号和所述第三待合成谐波信号的频率均不相同。通过大量的实验发现：播放与第一待合成谐波信号对应的低频声波可利于让大脑放松；而播放与第二待合成谐波信号对应的低频声波可利于右脑细胞活动，增强记忆力；而播放与第三待合成谐波信号对应的低频声波可利于小脑细胞活动，增强感知能力。因此通过对它们进行音乐合成，可通过物理方式实现增强长期记忆力和增强感知能力的目的。进一步具体的，当待合成的音乐模拟信号为具有左右双声道的音乐模拟信号时，则还选择一对频率介于4～12Hz的第四待合成谐波信号，通过播放与第四待合成谐波信号对应的低频声波可利于让左右脑平衡，提升专注能力。
S103.通过音乐合成器将选取的所述待合成谐波信号与音乐模拟信号进行信号叠加，得到合成模拟信号。
在所述步骤S103中，所述音乐模拟信号的频率主要在100Hz～20KHz之间，它既可以为单声道信号也可以为具有左右双声道的信号(此种情况下制作的音乐文件，需要通过耳机等设备进行受听)。为了避免因待合成谐波信号的引入而对音乐本身产生明显的杂音，则在 所述步骤S103进行信号叠加的过程中，一方面随着所述音乐模拟信号的即时幅度，同步升降所述待合成谐波信号的即时幅度；另一方面具体的，若在所述步骤S102中选择有频率介于4～8Hz的第一待合成谐波信号，则随着所述音乐模拟信号的时间进度，逐渐降低所述第一待合成谐波信号的频率；若在所述步骤S102中选择有频率介于8～12Hz的第二待合成谐波信号，则维持所述第二待合成谐波信号的频率不变；若在所述步骤S102中还选择一对频率介于4～12Hz的第四待合成谐波信号，则将两第四待合成谐波信号分别与左声道的音乐模拟信号和右声道的音乐模拟信号进行信号叠加，得到具有左右双声道的合成模拟信号。进一步具体的，针对两第四待合成谐波信号，随着所述音乐模拟信号的即时频率，同步升降对应声道的第四待合成谐波信号的即时频率，使两第四待合成谐波信号的即时频率变化关系互为此降彼升的变化关系。
S104.对所述合成模拟信号进行模数转换，生成目标音乐文件。
通过前述步骤S101～S104所制作的音乐文件，可以使受听者在听音乐的过程中，能够将低频率的脑电谐波以声波形式进入人耳及大脑中，进而可对大脑细胞产生共鸣效果，让脑细胞一直处于运动和活跃状态，提升脑运动机能，实现通过物理方式增强脑力、提升注意力、增强长期记忆力和增强感知能力的目的。此外，所述音乐文件的制作方法还具有目的性强、效率高和易于实现等优点，便于实际推广和应用。
综上，本实施例所提供的利于脑力增强的音乐文件的制作方法，具有如下有益效果：(1)通过本发明创造所制作的音乐文件，可以使受听者在听音乐的过程中，能够将低频率的脑电谐波以声波形式进入人耳及大脑中，进而可对大脑细胞产生共鸣效果，让脑细胞一直处于运动和活跃状态，提升脑运动机能，实现通过物理方式增强脑力、提升注意力、增强长期记忆力和增强感知能力的目的；(2)所述音乐文件的制作方法还具有目的性强、效率高和易于实现等优点，便于实际推广和应用。
如上所述，可较好地实现本发明。对于本领域的技术人员而言，根据本发明的教导，设计出不同形式的利于脑力增强的音乐文件的制作方法并不需要创造性的劳动。在不脱离本发明的原理和精神的情况下对这些实施例进行变化、修改、替换、整合和变型仍落入本发明的保护范围内。

Claims (8)

  1. 一种利于脑力增强的音乐文件的制作方法，其特征在于，包括如下步骤：
    S101.获取脑电波模拟信号；
    S102.通过傅立叶变换将所述脑电波模拟信号拆分成若干个谐波信号，并从中选取至少一个频率介于4～12Hz之间的待合成谐波信号；
    S103.通过音乐合成器将选取的所述待合成谐波信号与音乐模拟信号进行信号叠加，得到合成模拟信号；
    S104.对所述合成模拟信号进行模数转换，生成目标音乐文件。
  2. 如权利要求1所述的一种利于脑力增强的音乐文件的制作方法，其特征在于，在所述步骤S101中包括如下步骤：通过脑电波传感器采集目标听者的脑电波模拟信号。
  3. 如权利要求1所述的一种利于脑力增强的音乐文件的制作方法，其特征在于，在所述步骤S102中选择频率介于4～8Hz的第一待合成谐波信号、频率介于8～12Hz的第二待合成谐波信号和/或频率介于4～12Hz的第三待合成谐波信号，所述第一待合成谐波信号、所述第二待合成谐波信号和所述第三待合成谐波信号的频率均不相同。
  4. 如权利要求3所述的一种利于脑力增强的音乐文件的制作方法，其特征在于，若在所述步骤S102中选择有频率介于4～8Hz的第一待合成谐波信号，则在所述步骤S103进行信号叠加的过程中，随着所述音乐模拟信号的时间进度，逐渐降低所述第一待合成谐波信号的频率。
  5. 如权利要求3所述的一种利于脑力增强的音乐文件的制作方法，其特征在于，若在所述步骤S102中选择有频率介于8～12Hz的第二待合成谐波信号，则在所述步骤S103进行信号叠加的过程中，维持所述第二待合成谐波信号的频率不变。
  6. 如权利要求3所述的一种利于脑力增强的音乐文件的制作方法，其特征在于，当所述音乐模拟信号为具有左右双声道的音乐模拟信号时，则在所述步骤S102中还选择一对频率介于4～12Hz的第四待合成谐 波信号，并在所述步骤S103进行信号叠加的过程中，将两第四待合成谐波信号分别与左声道的音乐模拟信号和右声道的音乐模拟信号进行信号叠加，得到具有左右双声道的合成模拟信号。
  7. 如权利要求6所述的一种利于脑力增强的音乐文件的制作方法，其特征在于，在所述步骤S103进行信号叠加的过程中，随着所述音乐模拟信号的即时频率，同步升降对应声道的第四待合成谐波信号的即时频率，使两第四待合成谐波信号的即时频率变化关系互为此降彼升的变化关系。
  8. 如权利要求1所述的一种利于脑力增强的音乐文件的制作方法，其特征在于，在所述步骤S103进行信号叠加的过程中，随着所述音乐模拟信号的即时幅度，同步升降所述待合成谐波信号的即时幅度。
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