CN113380215A - Notch music generation method for tinnitus treatment - Google Patents
Notch music generation method for tinnitus treatment Download PDFInfo
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- CN113380215A CN113380215A CN202110596826.9A CN202110596826A CN113380215A CN 113380215 A CN113380215 A CN 113380215A CN 202110596826 A CN202110596826 A CN 202110596826A CN 113380215 A CN113380215 A CN 113380215A
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- G10H1/00—Details of electrophonic musical instruments
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- G—PHYSICS
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- 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
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- G—PHYSICS
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- G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
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Abstract
The invention provides a method for generating notch music for treating tinnitus, which can generate sound data based on original natural sound aiming at different ear sounds of an individual, can be effectively used for treating tinnitus with high and low frequencies, relieves the perception of a patient on tinnitus, and achieves the effect of treating and improving tinnitus. In the technical scheme, original natural sound is processed based on the frequency characteristics (center frequency, bandwidth) and loudness of the ear sound of each patient, and notch music is generated. The processing frequency range is derived based on the frequency characteristics of the patient's tinnitus to ensure that the notch music is spectrally tailored to the patient's tinnitus characteristics. The treatment is performed based on the loudness of the tinnitus of the patient, ensuring that the intensity of the notch music can produce a therapeutic effect. The finally obtained tinnitus notch therapeutic sound can be effectively applied to tinnitus sounds of different frequencies, and the problem that the traditional notch algorithm depends on original natural sound frequency spectrum distribution and is difficult to apply to high-frequency tinnitus is solved.
Description
Technical Field
The invention relates to the technical field of sound data production, in particular to a method for generating notch music for tinnitus treatment.
Background
Tinnitus refers to the subjective perception of the sound produced in the ear or head without any external sound source or electrical stimulation, and is often described as a hissing, buzzing, or peaky ring. Tinnitus is a common disorder of the auditory system that severely compromises a person's health and quality of life.
Notch music (Tailor-loud notched music tracing) is a sound treatment method which is generated aiming at the central mechanism theory of tinnitus side inhibition obstacle in recent years, and is mainly prepared into notch music by filtering a frequency range taking tinnitus frequency f as the center. Through the stimulation of the notch music, the stimulation excitation of the corresponding characteristic frequency neurons of the tinnitus frequency can be reduced, and the frequency stimulation outside the notch frequency range is kept, so that the tinnitus frequency region receives a side inhibition effect, adverse nerve remodeling is reversed, the perception of a patient on the tinnitus is lightened, and the effects of treating and improving the tinnitus are achieved.
At present, notch music is usually generated based on natural sounds such as wind sound, rain sound, etc., in combination with the actual tinnitus frequency of the patient. Natural sound has natural characteristics in the frequency spectrum, and especially, the main energy of sound which is pleasant to human senses is usually concentrated in middle and low frequencies (below 4 kHz), but based on the sampling survey of the existing tinnitus patients, the tinnitus of more than half of the patients belongs to high-frequency sound (4-8 kHz), so that the notch music made based on the traditional method is not suitable for the high-frequency tinnitus crowd which occupies more than one.
As shown in fig. 1, a in fig. 1 is a diagram of energy distribution of a common natural sound spectrum, the abscissa is frequency (Hz), and the ordinate is energy (dB); the energy of natural sound that the human ear feels pleased is mostly concentrated at medium and low frequencies; and b, the graph is a frequency spectrum diagram of notch music obtained by filtering a frequency range with the tinnitus frequency f as the center by using a traditional notch processing method based on the natural sound of the graph a.
Referring to fig. 2, the graph c in fig. 2 is a diagram of the frequency spectrum of the auditory perception of a person with low frequency tinnitus (tinnitus frequency f) listening to the notch music of graph b, the person's tinnitus frequency region being within the frequency range of the notch music being filtered out, the notch music frequency region having sufficient energy to suppress the tinnitus frequency region from either side of the person's tinnitus frequency region to reduce the person's perception of the tinnitus.
Fig. 2 d is a graph of notch music made using the natural sound of fig. a centered on a high frequency tinnitus patient (tinnitus frequency f 1) based on conventional methods; when a high-frequency tinnitus patient uses the notch music in the d picture, the energy of the notch music in the high-frequency area is insufficient, the tinnitus frequency area is difficult to be inhibited from two sides of the tinnitus frequency area of the patient, and the patient can clearly perceive the existence of self tinnitus sound when listening to the notch music in the d picture; that is, due to the energy distribution characteristics of common natural sound frequency spectrum, the traditional method of incisional track processing can play a better effect when the tinnitus of the patient belongs to the low-frequency tinnitus, but the effect played when the tinnitus of the patient belongs to the high-frequency tinnitus is limited.
Disclosure of Invention
In order to solve the technical problem that the notch music generated based on the traditional notch music generation method has poor effect on high-frequency tinnitus, the invention provides the notch music generation method for tinnitus treatment, which can generate notch music sound data for individuals, is more targeted for the sound data, and can achieve the treatment effect on tinnitus with any intensity.
The technical scheme of the invention is as follows: a method of producing notch music for tinnitus treatment, comprising the steps of:
s1: acquiring tinnitus center frequency f, tinnitus width w and tinnitus loudness s of ear sound of a patient;
the tinnitus center frequency f is the middle point of the auditory perception frequency of the tinnitus sound of the patient on the frequency spectrum;
the tinnitus width w is the width of the tinnitus which is the same as the external narrow-band noise on the frequency spectrum when the patient subjectively feels the tinnitus;
the loudness s of the tinnitus is the volume of the tinnitus which is the same as the external sound when the patient subjectively feels that the tinnitus is equal to the external sound;
s2: selecting natural acoustic data as basic data;
the frequency range of the underlying data comprises the tinnitus center frequency f;
s3: confirming an enhanced frequency interval and enhanced intensity based on the tinnitus sound of the patient;
the enhancing frequency interval is a continuous frequency interval which is positioned in the frequency range of the natural sound data and takes the tinnitus center frequency f as the center;
the absolute value of the difference value between the enhancing intensity and the sound intensity corresponding to the tinnitus loudness s does not exceed a preset enhancing threshold value;
s4: performing enhancement processing on the natural sound data;
the enhancement treatment comprises the following steps: enhancing the sound intensity of the sound data within the enhanced frequency range to the enhanced intensity in the natural sound data to obtain enhanced sound data;
s5: confirming a notch frequency interval based on the enhanced sound data;
the notch frequency interval is a continuous frequency interval which takes the tinnitus center frequency f as the center in the range of the enhanced frequency interval;
s6: performing notch processing on the enhanced sound data;
the notch processing comprises the following steps: and reducing the audio energy in the enhanced sound data within the notch frequency interval to a value smaller than the tinnitus loudness s, thus obtaining the notch music for tinnitus treatment.
It is further characterized in that:
the notch frequency interval confirmation method comprises the following steps:
let the enhancement frequency interval be (fl 1, fu1), where: fl1< f < fu 1;
the notch frequency interval is (fl 2, fu2), then: fl1< fl2< f < fu2< fu1
Meanwhile, the enhancement frequency interval and the notch frequency interval satisfy the following relations:
fl1=f/w1，fu1=f*w1，fl2=f/w2，fu2=f*w2；
wherein w1 is the enhancement width corresponding to the enhancement frequency bin, w1= n1 xw;
w2 is the notch width corresponding to the notch frequency interval, w2= n2 xw;
n1 and n2 are frequency expanding values, n1 and n2 are positive numbers, and 0.1< n2< n1< 10;
in the enhancing processing, when the sound intensity of the sound data in the enhanced frequency range is smaller than the enhanced intensity, a difference value of the intensity is supplemented into the sound data in the enhanced frequency range by adopting an enhancing or overlapping method, so that the sound intensity of the enhanced sound data in the enhanced frequency range is enhanced to the enhanced intensity, and the intensity of natural sound in other frequency bands is kept unchanged;
in the notch processing, reducing the audio energy in the enhanced sound data within the notch frequency interval to be as low as 0;
the absolute value of the enhancement threshold is 20 dB.
The invention provides a method for generating notch music for treating tinnitus, which aims at obtaining the central frequency of ear sound of each patient to obtain an enhanced frequency interval, enhances the data positioned in the enhanced frequency interval in natural sound data, and then performs notch processing on the enhanced natural sound data to ensure the obtained personalized notch music.
Drawings
FIG. 1 is a diagram illustrating a natural sound and notch processing method in the prior art;
FIG. 2 is a schematic diagram of the frequency spectrum of the auditory perception of a low frequency tinnitus patient and a high frequency tinnitus patient using notch music generated based on the prior art, respectively;
FIG. 3 is a flow chart of a method for generating notch music according to the present invention;
FIG. 4 is a schematic frequency spectrum diagram of basic data and enhanced sound data obtained based on the method of the present patent;
FIG. 5 is a schematic frequency diagram of notch music obtained based on the method of the present patent;
fig. 6 is a schematic diagram of the relationship between notch music and ear sound obtained based on the method of the present patent.
Detailed Description
As shown in fig. 3, a method of generating notch music for tinnitus treatment includes the following steps.
S1: acquiring tinnitus center frequency f, tinnitus width w and tinnitus loudness s of ear sound of a patient;
the tinnitus center frequency f is the midpoint of the auditory perception frequency of the tinnitus sound of the patient on the frequency spectrum;
the tinnitus width w is the width of the tinnitus which is the same as the external narrow-band noise on the frequency spectrum when the patient subjectively feels the tinnitus;
the loudness s of tinnitus is the volume at which the patient subjectively perceives tinnitus as being equivalent to external sounds.
When the tinnitus detection device is specifically implemented, the center frequency, the width and the loudness of the ear sound of a patient can be obtained by utilizing the existing tinnitus detection device. The sound-giving equipment is used for giving a pure-tone sound signal with the center frequency f (Hz), the width w and the loudness s (dB), and an operator is allowed to repeatedly adjust the parameters to find a signal which enables the patient to feel the tinnitus most closely, and the center frequency, the width and the loudness of the ear sound of the patient at the moment are recorded as input.
S2: selecting natural acoustic data as basic data;
the frequency range of the underlying data includes the tinnitus center frequency f.
Selecting natural sound data as basic data from an existing natural sound audio library; regarding the selection of the natural sound data as the data base, a certain sound with better subjective audibility is selected from a natural sound audio library, and the volume of the sound played by the sound is adjusted to a comfortable value. In specific implementation, artificial synthetic noise such as white noise and speech noise can be selected according to the actual condition of a patient. The sound liked by the patient is selected as the basic data to be made into the notch music, so that the ear sound can be effectively treated, and the use experience of the user can be improved
S3: confirming an enhanced frequency interval and enhanced intensity based on the tinnitus sound of the patient;
the enhanced frequency interval is a continuous frequency interval which is positioned in the frequency range of the natural sound data and takes the tinnitus center frequency f as the center;
the absolute value of the difference between the enhancement intensity and the sound intensity corresponding to the tinnitus loudness s does not exceed a preset enhancement threshold; in this embodiment, the absolute value of the enhancement threshold is 20dB, that is, the difference between the enhancement intensity and the sound intensity corresponding to the tinnitus loudness s is not more than plus or minus 20 dB. Through the setting of the enhanced intensity and the enhanced threshold value, the natural transition between the finally obtained notch music sound and the tinnitus sound is ensured, and uncomfortable sound change is avoided.
S4: enhancing the natural sound data;
the enhancement treatment comprises the following steps: enhancing the sound intensity of the sound data within the enhanced frequency range to enhanced intensity in the natural sound data to obtain enhanced sound data;
in the enhancing processing, when the sound intensity of the sound data in the enhancing frequency range is smaller than the enhancing intensity, the difference value of the intensity is supplemented into the sound data in the enhancing frequency range by adopting an enhancing or overlapping method, so that the sound intensity of the enhanced sound data in the enhancing frequency range is enhanced to the enhancing intensity, and the intensity of the natural sound in other frequency bands is kept unchanged. In particular, the difference between the sound intensity of the sound data in the enhanced frequency range and the enhanced intensity may be compensated for by any method known in the art, tools, and sound enhancement processing algorithms, such as fourier transform, filters, equalizers, etc.
As shown in fig. 4, the spectrum diagram of the natural sound as the basic data and the enhanced sound data ensures that the notch music facing to the high-frequency and low-frequency tinnitus can be generated based on the natural sound data by the method of the present invention through the enhancement processing of the sound intensity of the sound data in the enhanced frequency range in the natural sound data, and the limitation of the spectrum characteristics of the natural sound data itself is broken through.
S5: confirming a notch frequency interval based on the enhanced sound data;
the notch frequency interval is a section of continuous frequency interval which takes the tinnitus center frequency f as the center in the range of the enhanced frequency interval;
the notch frequency interval confirmation method comprises the following steps:
let the enhancement frequency bin be (fl 1, fu1), where: fl1< f < fu 1; the enhancement frequency interval is a section of continuous frequency interval within the ranges of fl1 and fu 1;
the notch frequency interval is (fl 2, fu2), then: fl1< fl2< f < fu2< fu 1; the notch frequency interval is located in a section of continuous frequency interval in the range of the enhancement frequency interval, and the upper and lower lines of the frequency of the notch frequency interval are as follows: fl2, fu 2;
meanwhile, the enhanced frequency interval and the enhanced frequency interval satisfy the following relations:
fl1=f/w1，fu1=f*w1，fl2=f/w2，fu2=f*w2；
w1 is the enhancement width corresponding to the enhancement frequency interval, w1= n1 xw;
w2 is the notch width corresponding to the notch frequency interval, w2= n2 xw;
n1, n2, n1 and n2 are all positive numbers and 0.1< n2< n1< 10.
As shown in fig. 5, a frequency diagram of notch music obtained based on the method of the present patent; according to the method, the notch frequency interval in the enhanced frequency range is obtained through setting frequency extension values n1 and n2, so that the tinnitus frequency audio is cut off, but the audio outside the notch frequency interval in the enhanced frequency range can be reserved, the finally generated notch music is ensured to have enough energy to perform side suppression on the tinnitus frequency region from two sides of the tinnitus frequency f region of a patient, and the perception of the patient on the tinnitus is relieved.
S6: performing notch processing on the enhanced sound data;
the notch processing is as follows: and reducing the audio energy in the notch frequency interval in the enhanced sound data to a value smaller than the tinnitus loudness s, thus obtaining the notch music for treating the tinnitus. The audio energy in the enhanced sound data within the notch frequency interval is reduced to a value far smaller than the tinnitus loudness s, and the stimulation excitation of the characteristic frequency neuron corresponding to the tinnitus frequency f is not caused as a standard in specific implementation; in the notch processing of this embodiment, the audio energy in the enhanced sound data within the notch frequency interval is reduced to 0, so as to ensure that the reaction of the tinnitus frequency f corresponding to the characteristic frequency neuron is not caused; in one embodiment, the enhanced audio data is apodized using prior art means such as fourier transforms, filters, or equalizers.
As shown in fig. 6, a schematic diagram of the relationship between notch music and ear sound obtained based on the method of the present patent; according to the method, a processing frequency range is obtained based on the frequency characteristics of the tinnitus of the patient, and the notch music is ensured to be matched with the tinnitus characteristics of the patient on a frequency spectrum; processing based on the tinnitus loudness of the patient to ensure that the intensity of the notch music can produce a therapeutic effect; the finally obtained tinnitus notch therapeutic sound can be effectively applied to tinnitus sounds of different frequencies, and the problem that the traditional notch algorithm depends on original natural sound frequency spectrum distribution and is difficult to apply to high-frequency tinnitus is solved.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept herein, and it is intended to cover all such modifications and variations as fall within the scope of the invention.
Claims (5)
1. A method of producing notch music for tinnitus treatment, comprising the steps of:
s1: acquiring tinnitus center frequency f, tinnitus width w and tinnitus loudness s of ear sound of a patient;
the tinnitus center frequency f is the middle point of the auditory perception frequency of the tinnitus sound of the patient on the frequency spectrum;
the tinnitus width w is the width of the tinnitus which is the same as the external narrow-band noise on the frequency spectrum when the patient subjectively feels the tinnitus;
the loudness s of the tinnitus is the volume of the tinnitus which is the same as the external sound when the patient subjectively feels that the tinnitus is equal to the external sound;
s2: selecting natural acoustic data as basic data;
the frequency range of the underlying data comprises the tinnitus center frequency f;
s3: confirming an enhanced frequency interval and enhanced intensity based on the tinnitus sound of the patient;
the enhancing frequency interval is a continuous frequency interval which is positioned in the frequency range of the natural sound data and takes the tinnitus center frequency f as the center;
the absolute value of the difference value between the enhancing intensity and the sound intensity corresponding to the tinnitus loudness s does not exceed a preset enhancing threshold value;
s4: performing enhancement processing on the natural sound data;
the enhancement treatment comprises the following steps: enhancing the sound intensity of the sound data within the enhanced frequency range to the enhanced intensity in the natural sound data to obtain enhanced sound data;
s5: confirming a notch frequency interval based on the enhanced sound data;
the notch frequency interval is a continuous frequency interval which takes the tinnitus center frequency f as the center in the range of the enhanced frequency interval;
s6: performing notch processing on the enhanced sound data;
the notch processing comprises the following steps: and reducing the audio energy in the enhanced sound data within the notch frequency interval to a value smaller than the tinnitus loudness s, thus obtaining the notch music for tinnitus treatment.
2. A method of notch music generation for tinnitus treatment according to claim 1 wherein: the notch frequency interval confirmation method comprises the following steps:
let the enhancement frequency interval be (fl 1, fu1), where: fl1< f < fu 1;
the notch frequency interval is (fl 2, fu2), then: fl1< fl2< f < fu2< fu1
Meanwhile, the enhancement frequency interval and the notch frequency interval satisfy the following relations:
fl1=f/w1，fu1=f*w1，fl2=f/w2，fu2=f*w2；
wherein w1 is the enhancement width corresponding to the enhancement frequency bin, w1= n1 xw;
w2 is the notch width corresponding to the notch frequency interval, w2= n2 xw;
n1 and n2 are frequency extension values, n1 and n2 are positive numbers, and 0.1< n2< n1< 10.
3. A method of notch music generation for tinnitus treatment according to claim 1 wherein: in the enhancing processing, when the sound intensity of the sound data in the enhancing frequency range is smaller than the enhancing intensity, the difference value of the intensity is supplemented into the sound data in the enhancing frequency range by adopting an enhancing or overlapping method, so that the sound intensity of the enhanced sound data in the enhancing frequency range is enhanced to the enhancing intensity, and the intensity of natural sound in other frequency bands is kept unchanged.
4. A method of notch music generation for tinnitus treatment according to claim 1 wherein: and in the notch processing, reducing the audio energy in the enhanced sound data within the notch frequency interval to 0.
5. A method of notch music generation for tinnitus treatment according to claim 1 wherein: the absolute value of the enhancement threshold is 20 dB.
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