CN113284503B - Tinnitus treatment sound generation method based on natural sound masking - Google Patents
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- 230000000873 masking effect Effects 0.000 title claims abstract description 106
- 208000009205 Tinnitus Diseases 0.000 title claims abstract description 87
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001228 spectrum Methods 0.000 claims description 10
- 230000002708 enhancing effect Effects 0.000 claims description 6
- 230000008447 perception Effects 0.000 claims description 4
- 238000002560 therapeutic procedure Methods 0.000 description 4
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Abstract
The invention provides a tinnitus treatment sound generation method based on natural sound masking, which can generate sound data based on natural sound aiming at individual tinnitus sound, the sound data is more targeted, the pertinence is achieved, the tinnitus sound of each individual can be effectively masked, and the use experience of a user can be improved. In the technical scheme, natural sound is processed to generate tinnitus treatment sound based on the frequency characteristics (central frequency, bandwidth) and loudness of ear sound of each patient. The center frequency and bandwidth of the masking sound are derived based on the frequency characteristics of the patient's tinnitus to ensure that the tinnitus treatment sound is capable of masking the ear ring sound within an effective frequency and width range. The masking intensity is obtained based on the tinnitus loudness of the patient, the intensity of the treatment sound can be effectively masked, and the finally obtained tinnitus treatment sound generated based on the natural sound can effectively mask the ear sound.
Description
Technical Field
The invention relates to the technical field of sound data production, in particular to a tinnitus treatment sound generation method based on natural sound masking.
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.
The masking means that: a stronger sound causes a larger vibration of the base film so that other sounds having a frequency close to that of the base film, which causes a smaller vibration of the base film, are not easily perceived, resulting in a phenomenon in which the smaller sound is "masked" or "covered". In the auditory nervous system, the masking noise can inhibit partial neuron evoked discharge of each level of center, and can also improve the threshold of auditory nerve, brainstem and cortex evoked potential and reduce the amplitude. Masking therapy for tinnitus refers to masking an ear sound with a sound, or a therapy that suppresses the sound of tinnitus with a sound. After a series of tests on tinnitus properties, specific external sound matched with tinnitus tone and loudness is selected as masking sound, and the masking sound is listened to under the guidance of doctors, so as to achieve the method for inhibiting tinnitus or relieving tinnitus symptoms.
The traditional habitual therapy is that a patient listens to natural sounds such as wind sound, underwater sound and the like to habituate tinnitus, although the natural sounds are superior to noise in terms of audibility and easy to adhere to by the patient. However, the tinnitus frequency range of the patient has strong individual difference and is distributed in different frequency ranges of high-frequency sound (4-8 kHz), medium-frequency sound (1 k-4 kHz), low-frequency sound (below 1 kHz) and the like; based on a sampling survey of existing tinnitus patients, more than half of tinnitus patients are found to be high-frequency (4-8 kHz) tinnitus, and most of the sounds which are pleasant to human senses belong to the middle-frequency sound due to the natural characteristics of the natural sound on the frequency spectrum. Therefore, the prior art method of playing only the natural sound corresponding to the tinnitus frequency band cannot effectively mask the tinnitus in all frequency bands.
As shown in fig. 1, when the frequency of tinnitus of a patient is higher than that of natural sound, there are the following problems:
(1) even if the sound intensity of the natural sound is increased, the natural sound cannot block the earring sound due to the absence of the natural sound spectrum in the tinnitus frequency band.
(2) High-frequency ear sounds are shielded only by adjusting the natural sound intensity, so that the high-frequency ear sounds cannot be effectively shielded, and secondary damage is caused to the auditory sense of a patient.
(3) In the existing tinnitus masking sound therapy, noise such as white noise or narrow-band noise is usually adopted to mask the tinnitus. However, when listening to noise for a long time, patients often feel dull and have poor experience effect, so that the patients are unwilling to accept and cannot obtain curative effect.
Disclosure of Invention
In order to solve the problems that in the prior art, noise data for treating tinnitus is poor in experience of a user, and unprocessed pure natural sound data is difficult to effectively shield tinnitus in all frequency bands, the invention provides a tinnitus treatment sound generation method based on natural sound masking.
The technical scheme of the invention is as follows: a tinnitus treatment sound generation method based on natural sound masking is characterized by comprising the following steps:
s1: acquiring the central frequency f and loudness s of the ear sound of a patient;
the center frequency f is the midpoint of the auditory perception frequency of the tinnitus sound of the patient on the frequency spectrum;
the loudness s is the volume of the tinnitus which is subjectively felt by the patient and is equal to the external sound;
s2: acquiring the masking strength c of the tinnitus treatment sound based on the ear sound of the patient;
the masking intensity c is the difference value of the total energy of the tinnitus treatment sound in a masking range and the sound intensity corresponding to the loudness s; the masking strength c is a positive number;
s3: acquiring and calculating a frequency range to be masked of the tinnitus treatment sound based on the ear sound of the patient, and recording the frequency range as a masking frequency range;
the masking frequency range is a continuous frequency interval between a lower frequency limit fl and an upper frequency limit fu;
the masking frequency range takes on values that are: lower frequency limit fl < the center frequency f < upper frequency limit fu;
s4: selecting natural acoustic data as basic data;
s5: finding sound data in the masking frequency range from the natural sound data, and recording the sound data as to-be-processed interval data;
enhancing the sound intensity of the interval data to be processed to the shielding sound intensity;
the masking sound intensity is the sound intensity corresponding to the loudness s + the masking intensity c;
and the adjusted natural sound data is the tinnitus treatment sound.
It is further characterized in that:
in step S5, a difference between the masking sound intensity and the sound intensity of the to-be-processed interval data is supplemented to the to-be-processed interval data by an enhancing or superimposing method, so that the sound intensity is enhanced to the masking sound intensity;
in step S2, a masking width w is also required to be obtained; the masking width w is the width of the tinnitus treatment sound in the frequency spectrum; the obtaining method comprises the following steps:
w＝25+75(1+1.4f2)0.69
wherein f is the center frequency of the ear sound;
in step S3, the masking frequency range is calculated based on the masking width w;
the lower frequency limit fl and the upper frequency limit fu correspond to two boundary values of the masking width w, respectively;
the upper frequency limit fu has the following value range: fu is more than or equal to 1.01f and less than or equal to 10 f; the value range of the lower frequency limit fl is as follows: fl is more than or equal to 0.1f and less than or equal to 0.99 f.
According to the tinnitus treatment sound generation method based on natural sound masking, the center frequency and loudness of ear sound are obtained for each patient, the natural sound is adjusted based on the center frequency and loudness to generate tinnitus treatment sound, the obtained tinnitus treatment sound generated based on the natural sound is ensured to be more targeted, and the treatment effect is effectively ensured; the tinnitus treatment sound is ensured to cover the frequency of the ear sound within the frequency width range based on the masking frequency range, the intensity of the masking sound is ensured to cover the intensity of the ear sound based on the masking intensity, and the finally obtained tinnitus treatment sound generated based on the natural sound can effectively shield the ear sound and improve the use experience of a user.
Drawings
FIG. 1 is a diagram illustrating a relationship between ear sounds and natural sounds in the prior art;
FIG. 2 is a flow chart of the tinnitus sound generation method of the present patent;
fig. 3 is a schematic diagram of the relationship between tinnitus treatment sound and ear sound obtained based on the technical scheme of the patent.
Detailed Description
The invention relates to a tinnitus treatment sound generation method based on natural sound masking, which specifically comprises the following steps.
S1: acquiring the central frequency f and loudness s of the ear sound of a patient;
the center frequency f is the midpoint of the auditory perception frequency of the patient's tinnitus sound on the spectrum;
the loudness s is the volume of the tinnitus which is subjectively felt by the patient and is equal to the external sound;
when the tinnitus detector is specifically implemented, the center frequency and loudness of the ear sound of a patient can be obtained by utilizing the existing tinnitus detection equipment. The sound equipment is used for giving a pure-tone sound signal with the center frequency f (Hz) and the loudness s (dB), the two parameters are repeatedly adjusted to find a signal which enables the patient to feel the tinnitus most closely, and the f and s at the moment are recorded as the center frequency and the loudness of the ear sound of the patient.
S2: acquiring the masking strength c and the masking width w of the tinnitus treatment sound based on the ear sound of the patient;
the masking intensity c (dB) is the difference value of the total energy of the tinnitus treatment sound in the masking range and the sound intensity corresponding to the loudness s; the masking strength c is a positive number;
the tinnitus detection equipment in the prior art finishes the collection of tinnitus data of a patient based on an acoustic signal processing technology, so that frequency bands are divided through frequency intervals; therefore, when the parameter corresponding to the tinnitus sound of the patient is collected based on the existing sound supply device, the masking width w is collected; the masking width w is the width of the tinnitus treatment sound in the frequency spectrum.
The masking strength c and masking width w need to be selected so that the earring is completely imperceptible to the patient. Therefore, it is necessary to first generate a therapeutic sound and listen to it by the patient according to the diagnosis experience, starting with selecting a smaller value, and if the requirement for completely masking the earring sound cannot be satisfied, gradually increasing the masking strength and masking width until the requirement is satisfied and the patient feels comfortable.
In this embodiment, the masking strength is performed by a pure tone audiometry 5dB platform masking method; based on the central frequency f of the ear ring, the masking width w is calculated by a Munich critical bandwidth method, and during specific implementation, the masking width w can be further adjusted and expanded to other suitable widths according to the actual condition of a patient:
w＝25+75(1+1.4f2)0.69
the masking width w is obtained by adopting a method of critical bandwidth based on the central frequency f of the ear sound, the masking bandwidth corresponding to the central frequency f can be more accurately obtained, the masking sound corresponding to the masking frequency range obtained based on the masking bandwidth w can play a more effective masking role on the tinnitus sound at the central frequency f, and further the masking effect of the tinnitus treatment sound is improved.
S3: calculating the frequency range of the tinnitus treatment sound needing to be masked based on the masking width w, and recording the frequency range as a masking frequency range;
the masking frequency range is a continuous frequency interval between the lower frequency limit fl and the upper frequency limit fu;
the values of the masking frequency ranges are in accordance with: lower frequency limit fl < center frequency f < upper frequency limit fu;
the lower frequency limit fl and the upper frequency limit fu correspond to two boundary values of the masking width w, respectively.
For the purposes of protecting hearing and improving treatment pertinence, the masking frequency range is not suitable to be set too large or too small, so after the masking frequency range is calculated based on the masking width w, if the masking frequency range exceeds too large, the value ranges of the upper frequency limit fu and the upper frequency limit fu need to be adjusted; the method for converting the masking width w into a specific masking frequency range can be realized based on the prior art;
the upper frequency limit fu has the following value range: fu is more than or equal to 1.01f and less than or equal to 10 f; the lower frequency limit fl has a value range of: fl is more than or equal to 0.1f and less than or equal to 0.99 f; based on the limitation of the value ranges of the lower frequency limit fl and the upper frequency limit fu, the finally obtained masking frequency range of the tinnitus treatment sound is ensured, the ear sound of the patient can be completely shielded, and the ear of the patient can be prevented from being damaged secondarily.
S4: 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.
S5: finding out sound data in the masking frequency range from the natural sound data, and recording the sound data as to-be-processed interval data; the total energy of the natural sound data is ea, and the energy of the data in the interval to be processed is recorded as e0, wherein ea is more than or equal to e 0;
enhancing the sound intensity of the interval data to be processed to the shielding sound intensity;
the masking sound intensity is the sound intensity + masking intensity c corresponding to the loudness s.
In the patent, the difference value is supplemented into the data of the interval to be processed by adopting an enhancing or overlapping method, so that the sound intensity of the data on the frequency spectrum to be masked is enhanced to the masking sound intensity, the natural sound on other frequency bands is kept unchanged, the original distribution rule of the natural sound frequency spectrum is maintained, the natural sound auditory sensation is not changed greatly, and the uncomfortable auditory sensation is not caused.
The natural sound data which compensates the sound intensity of the data in the interval to be processed is the tinnitus treatment sound.
In specific implementation, the difference between the masking sound intensity and e0 can be supplemented to the to-be-processed interval data of the natural sound data by any methods of the prior art, tools, and sound enhancement processing algorithms, such as fourier forward-inverse transformation, filters, equalizers, etc., as shown in fig. 2, the intensity of the to-be-processed interval data in the finally obtained tinnitus treatment sound is (sound intensity corresponding to loudness s + masking intensity c); and the intensity of the sound data of other frequency ranges outside the masking frequency range in the tinnitus treatment sound keeps the original numerical value, and the total energy of the finally obtained tinnitus treatment sound is as follows:
ea + (intensity of sound + masking intensity c-e0 for loudness s).
In the technical scheme, natural sound is processed to generate tinnitus treatment sound based on the frequency characteristics (central frequency, bandwidth) and loudness of ear sound of each patient. The center frequency and bandwidth of the masking sound are derived based on the frequency characteristics of the patient's tinnitus to ensure that the tinnitus treatment sound is capable of masking the ear ring sound within an effective frequency and width range. The masking intensity is obtained based on the tinnitus loudness of the patient, the intensity of the treatment sound can be effectively masked, and the finally obtained tinnitus treatment sound generated based on the natural sound can effectively mask the ear sound. No matter tinnitus sound in any frequency band, the tinnitus treatment sound used for treatment can be generated on the basis of natural sound data based on the method, and the technical scheme of the patent is guaranteed to be more practical.
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 tinnitus treatment sound generation method based on natural sound masking is characterized by comprising the following steps:
s1: acquiring the central frequency f and loudness s of the ear sound of a patient;
the center frequency f is the midpoint of the auditory perception frequency of the tinnitus sound of the patient on the frequency spectrum;
the loudness s is the volume of the tinnitus which is subjectively felt by the patient and is equal to the external sound;
s2: acquiring the masking strength c of the tinnitus treatment sound based on the ear sound of the patient;
the masking intensity c is the difference value of the total energy of the tinnitus treatment sound in a masking range and the sound intensity corresponding to the loudness s; the masking strength c is a positive number;
s3: acquiring and calculating a frequency range to be masked of the tinnitus treatment sound based on the ear sound of the patient, and recording the frequency range as a masking frequency range;
the masking frequency range is a continuous frequency interval between a lower frequency limit fl and an upper frequency limit fu;
the masking frequency range takes on values that are: lower frequency limit fl < the center frequency f < upper frequency limit fu;
s4: selecting natural acoustic data as basic data;
s5: finding sound data in the masking frequency range from the natural sound data, and recording the sound data as to-be-processed interval data;
enhancing the sound intensity of the interval data to be processed to the shielding sound intensity;
the masking sound intensity is the sound intensity corresponding to the loudness s + the masking intensity c;
and the adjusted natural sound data is the tinnitus treatment sound.
2. A tinnitus treatment sound generation method based on natural sound masking according to claim 1 characterised in that: in step S5, a difference between the masking sound intensity and the sound intensity of the to-be-processed interval data is supplemented to the to-be-processed interval data by an enhancing or superimposing method, so that the sound intensity is enhanced to the masking sound intensity.
3. A tinnitus treatment sound generation method based on natural sound masking according to claim 1 characterised in that: in step S2, a masking width w is also required to be obtained; the masking width w is the width of the tinnitus treatment sound in the frequency spectrum; the obtaining method comprises the following steps:
w＝25+75(1+1.4f2)0.69
where f is the center frequency of the earring.
4. A tinnitus treatment sound generation method based on natural sound masking according to claim 3 characterised in that: in step S3, the masking frequency range is calculated based on the masking width w;
the lower frequency limit fl and the upper frequency limit fu correspond to two boundary values of the masking width w, respectively.
5. A tinnitus treatment sound generation method based on natural sound masking according to claim 1 characterised in that: the upper frequency limit fu has the following value range: fu is more than or equal to 1.01f and less than or equal to 10 f; the value range of the lower frequency limit fl is as follows: fl is more than or equal to 0.1f and less than or equal to 0.99 f.
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| CN114299901A (en) * | 2021-12-17 | 2022-04-08 | 无锡清耳话声科技有限公司 | Tinnitus treatment sound generation method based on notch and audio balance |
| CN114286271B (en) * | 2021-12-17 | 2024-02-23 | 清华大学 | Tinnitus treatment sound generation method based on masking and audio equalization |
| CN114339563B (en) * | 2021-12-17 | 2023-01-06 | 清华大学 | A Multi-mode Tinnitus Therapeutic Sound Generation System |
| CN115553760A (en) * | 2022-08-27 | 2023-01-03 | 上海博听科技有限公司 | Music synthesis method for tinnitus rehabilitation and online tinnitus diagnosis and rehabilitation system |
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| AUPP927599A0 (en) * | 1999-03-17 | 1999-04-15 | Curtin University Of Technology | Tinnitus rehabilitation device and method |
| KR101393956B1 (en) * | 2010-04-16 | 2014-05-12 | 비덱스 에이/에스 | A hearing aid and a method for alleviating tinnitus |
| DE102011001793A1 (en) * | 2011-04-05 | 2012-10-11 | Burmester Audiosysteme Gmbh | Hearing-aid for balancing hearing loss of tinnitus patient, has filter designed as notch filter and high-slope filter for reducing or disabling environment sound signal in predetermined frequency range |
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