CN112006843A - Tinnitus therapeutic apparatus and use method thereof - Google Patents
Tinnitus therapeutic apparatus and use method thereof Download PDFInfo
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Abstract
The invention relates to a tinnitus therapeutic apparatus and a use method thereof, which is characterized by comprising a shell, a central processing unit, an SD card, a voice chip, keys, a nixie tube, a liquid crystal display screen and an earphone; the shell is internally provided with a central processing unit, an SD card and a voice chip, and is provided with a key, a nixie tube, a liquid crystal display screen and an earphone; the SD card is used for storing various treatment sound signals of various frequency bands; the button is used for selecting a treatment mode and a treatment sound signal stored by the SD card, inputting tinnitus frequency and feeding back a tinnitus frequency matching result and a tinnitus loudness matching result; the central processing unit is used for adopting the sweep frequency sound test, carrying out tinnitus frequency matching and tinnitus loudness matching on the user according to the input tinnitus frequency, carrying out audio processing according to the selected treatment sound and treatment mode and the tinnitus frequency and tinnitus loudness obtained by matching to obtain a finally synthesized treatment sound signal, and the earphone is used for outputting the finally synthesized treatment sound signal.
Description
Technical Field
The invention relates to a tinnitus therapeutic apparatus and a using method thereof, belonging to the technical field of tinnitus therapeutic apparatus.
Background
Classifying the tinnitus, namely classifying the tinnitus into subjective tinnitus and objective tinnitus according to clinical manifestations, wherein the subjective tinnitus means that a patient subjectively realizes existence of tinnitus sound but does not have external sound source stimulation; objective tinnitus refers to tinnitus caused by the contraction of sound in the vicinity of the ear, e.g., pharyngeal or ear muscles, of the patient's body. The mechanism of tinnitus production: any damage to the auditory pathway almost exclusively leads to tinnitus and is associated with increased spontaneous emission of nuclei in the auditory pathway and poor reorganization of the auditory cortex. Negative psychological mood also creates a vicious circle with tinnitus.
The tinnitus treatment means is mainly divided into medicine treatment, Chinese herbal medicine treatment, hearing aid treatment, transcranial magnetic stimulation treatment, sound therapy (sound masking treatment), tinnitus habitual therapy and the like, wherein the sound therapy treatment mechanism is that the tinnitus is treated by recombining the auditory cortex of the brain through stimulation sound with specific frequency. The existing method for treating tinnitus by using sound therapy comprises the following steps: and selecting a section of therapeutic sound, performing single-mode notch filtering on the therapeutic sound, and then playing the notch filtering to the patient for listening, thereby treating the tinnitus.
However, the tinnitus treatment device has some defects, such as the lack of tinnitus detection function, the single treatment sound and notch filtering mode, the imperfect treatment sound processing algorithm, and the like.
Disclosure of Invention
In view of the above problems, the present invention provides a tinnitus treatment apparatus with tinnitus detection function and a method of using the same.
In order to achieve the purpose, the invention adopts the following technical scheme: a tinnitus therapeutic apparatus comprises a shell, a central processing unit, an SD card, a voice chip, a key, a nixie tube, a liquid crystal display screen and an earphone;
the central processing unit, the SD card and the voice chip are arranged in the shell, and the key, the nixie tube, the liquid crystal display screen and the earphone are arranged on the shell;
the SD card is used for storing various treatment sound signals of various frequency bands;
the button is used for selecting a treatment mode and a treatment sound signal stored by the SD card, inputting tinnitus frequency and feeding back a tinnitus frequency matching result and a tinnitus loudness matching result;
the central processing unit is used for performing tinnitus frequency matching and tinnitus loudness matching on a user according to input tinnitus frequency by adopting a sweep frequency tone test, and performing audio processing according to the selected treatment sound and treatment mode and the tinnitus frequency and tinnitus loudness obtained by matching to obtain a finally synthesized treatment sound signal;
the nixie tube is used for displaying the input tinnitus frequency;
the liquid crystal display screen is used for displaying operation prompts, treatment sound information and frequency sweeping sound test results;
the voice chip is used for playing the finally synthesized therapeutic sound signal;
the earphone is used for outputting the finally synthesized therapeutic sound signal.
Further, the central processing unit is internally provided with:
the SD card storage module is used for storing various treatment sound signals of various frequency bands through the SD card;
the key module is used for selecting a treatment mode and a treatment sound signal stored by the SD card through the key, inputting tinnitus frequency and feeding back a tinnitus frequency matching result and a tinnitus loudness matching result;
the sweep frequency tone testing module is used for generating pure tones with different frequencies and different loudness according to the input tinnitus frequency by adopting sweep frequency tone testing, performing tinnitus frequency matching and tinnitus loudness matching on a user, and matching to obtain the tinnitus frequency and the tinnitus loudness of the user;
the liquid crystal display module is used for displaying operation prompts, treatment sound information and frequency sweeping sound test results through the liquid crystal display screen;
the audio processing module is used for carrying out audio processing according to the selected therapeutic sound signal and the therapeutic mode and the tinnitus frequency and the tinnitus loudness obtained by matching to obtain a finally synthesized therapeutic sound signal;
and the audio playing module is used for playing the finally synthesized therapeutic sound signal and pure tone for the sweep frequency tone test through the voice chip.
Further, the swept frequency tone test module includes:
the tinnitus frequency matching unit is used for automatically generating pure tones of corresponding frequencies according to the input tinnitus frequency, setting a plurality of frequencies by using octave intervals as intervals on the basis of the frequencies and equal frequency multiplication between the octave intervals, automatically generating the pure tones of the corresponding frequencies in real time to perform tinnitus frequency matching test, and matching to obtain the tinnitus frequency of a user;
and the tinnitus loudness matching unit is used for automatically generating pure sound corresponding to the loudness according to the preset tinnitus frequency, carrying out tinnitus loudness matching test by taking a preset decibel value as an interval on the basis of the loudness, and matching to obtain the tinnitus loudness of the user.
Further, the audio processing module comprises:
the signal modulation unit is used for generating a sine carrier signal with the frequency matched with the obtained tinnitus frequency according to the selected therapeutic sound signal and obtaining the therapeutic sound after signal modulation through AM modulation;
the Fourier transform unit is used for carrying out Fourier transform on the therapeutic sound after the signal modulation to obtain the frequency spectrum of the therapeutic sound after the signal modulation;
the notch filtering unit is used for carrying out corresponding notch filtering according to the frequency spectrum of the therapeutic sound after the signal modulation and the selected therapeutic mode to obtain the frequency spectrum of the therapeutic sound synthesized after the notch filtering;
and the inverse Fourier transform unit is used for performing inverse Fourier transform on the frequency spectrum of the therapeutic sound synthesized after the trace filtering to obtain a finally synthesized therapeutic sound signal, and the loudness of the therapeutic sound signal is the loudness of the tinnitus obtained through matching.
Further, the key includes:
the function key is used for selecting a treatment mode and a treatment sound signal stored by the SD card;
and the digital key is used for inputting tinnitus frequency and feeding back a tinnitus frequency matching result and a tinnitus loudness matching result.
Further, the audio playing module comprises:
the voice chip unit is used for playing the finally synthesized therapeutic sound signal and the tinnitus frequency and tinnitus loudness obtained by matching through the voice chip;
and the volume control unit is used for controlling the volume of the finally synthesized therapeutic sound signal through the key module according to the conversion of the gain and the amplification factor.
A use method of the tinnitus treatment instrument comprises the following steps:
1) the liquid crystal display screen displays a starting interface, and a user inputs tinnitus frequency through a key and displays the tinnitus frequency through a nixie tube;
2) the central processing unit adopts a sweep frequency sound test, pure sounds with different frequencies and different loudness are generated according to the input tinnitus frequency, tinnitus frequency matching and tinnitus loudness matching are carried out on a user, the user feeds back a tinnitus frequency matching result and a tinnitus loudness matching result through a key, and the tinnitus frequency and the tinnitus loudness are obtained through matching and are displayed through a liquid crystal display screen;
3) the user selects a treatment mode and a treatment sound signal stored by the SD card through a key and sends the treatment sound signal to the central processing unit;
4) the user inputs the tinnitus frequency obtained by matching through keys;
5) the central processing unit carries out audio processing according to the selected therapeutic sound signal and the therapeutic mode and the tinnitus frequency and the tinnitus loudness obtained by matching to obtain a finally synthesized therapeutic sound signal;
6) the voice chip plays the finally synthesized therapeutic sound signal and adjusts the volume through a key;
7) the earphone outputs the finally synthesized therapeutic sound signal, and the tinnitus patient listens to the therapeutic sound signal output by the earphone by wearing the earphone.
Further, the specific process of step 2) is as follows:
2.1) the tinnitus frequency matching unit automatically generates pure tones with corresponding frequencies according to the input tinnitus frequency, octave intervals are used as intervals on the basis of the frequencies, a plurality of frequencies are set between the octave intervals in an equal frequency doubling manner, the pure tones with corresponding frequencies are automatically generated in real time to carry out tinnitus frequency matching test, and the tinnitus frequency of the user is obtained through matching;
2.2) the tinnitus loudness matching unit automatically generates pure sound corresponding to the loudness according to the preset tinnitus frequency, and performs tinnitus loudness matching test by taking a preset decibel value as an interval on the basis of the loudness, so as to obtain the tinnitus loudness of the user through matching;
and 2.3) the liquid crystal display module displays the tinnitus frequency and the tinnitus loudness obtained by matching through a liquid crystal display screen.
Further, the specific process of step 5) is as follows:
5.1) the signal modulation unit generates a sine carrier signal with the frequency matched with the obtained tinnitus frequency according to the selected therapeutic sound signal, and obtains the therapeutic sound after signal modulation through AM modulation;
5.2) carrying out Fourier transform on the treatment sound after signal modulation by a Fourier transform unit to obtain the frequency spectrum of the treatment sound after signal modulation;
5.3) the notch filtering unit carries out corresponding notch filtering according to the frequency spectrum of the therapeutic sound after signal modulation and the selected therapeutic mode to obtain the frequency spectrum of the therapeutic sound synthesized after notch filtering;
and 5.4) carrying out Fourier inverse transformation on the frequency spectrum of the therapeutic sound synthesized after the trace filtering by the Fourier inverse transformation unit to obtain a finally synthesized therapeutic sound signal, wherein the loudness of the therapeutic sound signal is the loudness of the tinnitus obtained by matching.
Further, the specific process of step 5.3) is as follows:
5.3.1) setting the tinnitus frequency obtained by matching the frequency sweeping tone testing module to be f;
5.3.2) when the selected treatment mode is an octave mode, the notch filtering is an octave filtering, and the lower cut-off frequency of the octave filtering is according to the formula
The upper limit cut-off frequency of one octave filtering is obtained by calculation according to a formula
5.3.3) when the treatment mode selected is one thirdIn the octave mode, notch filtering is one-third octave filtering, and the lower limit cut-off frequency of the one-third octave filtering is according to a formula
The upper limit cut-off frequency of one-third octave filtering is obtained by calculation according to a formula
Calculating to obtain;
5.3.4) the signal output is the frequency spectrum of the synthesized therapeutic sound after notch filtering.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the tinnitus frequency and loudness of the user are tested by adopting sweep frequency sound based on the tinnitus sound inhibition therapy, personalized audio signal processing is carried out on the treatment sound by selecting different types of treatment sounds and treatment modes to obtain the treatment sound which is most matched with the user, the tinnitus is detected by adopting the idea of firstly detecting the tinnitus frequency and the tinnitus loudness and then treating, and the tinnitus of the user can be improved in a targeted and personalized manner.
2. Aiming at the problem of tinnitus detection function deficiency, the invention detects tinnitus by frequency sweep tone test to obtain tinnitus frequency and tinnitus loudness of tinnitus patients. Aiming at the problem of poor scheme, by adding different treatment sounds and treatment modes, the tinnitus condition of the user is improved through an audio processing module for neutralizing the ear sound.
3. The tinnitus treatment instrument adopts various treatment sound and treatment modes, performs neutralization inhibition on the sound signal of the frequency of the tinnitus of a patient through a signal modulation algorithm and based on a notch filtering method, realizes targeted and personalized tinnitus improvement of the patient, realizes the detection and treatment integration of the tinnitus, not only provides a new effective means for clinical treatment of the tinnitus, but also develops a new idea for the tinnitus treatment instrument industry, and can be widely applied to the technical field of tinnitus treatment instruments.
Drawings
FIG. 1 is a schematic diagram of the tinnitus treatment apparatus of the present invention;
FIG. 2 is a flow chart of the method of using the tinnitus treatment device of the present invention;
fig. 3 is a schematic diagram of the principle of audio processing in the present invention, wherein fig. 3(a) is a graph of the original therapeutic sound signal, fig. 3(b) is a graph of the sinusoidal carrier signal of the patient's tinnitus frequency, fig. 3(c) is a graph of the modulated therapeutic sound signal, fig. 3(d) is a graph of the frequency domain waveform of the therapeutic sound signal after fourier transform of fig. 3(c), fig. 3(e) is a graph of the therapeutic sound signal after notch filtering, and fig. 3(f) is a graph of the resultant therapeutic sound signal after inverse fourier transform.
Detailed Description
The present invention is described in detail below with reference to the attached drawings. It is to be understood, however, that the drawings are provided solely for the purposes of promoting an understanding of the invention and that they are not to be construed as limiting the invention.
As shown in fig. 1, the tinnitus therapeutic apparatus provided by the present invention comprises a housing, a DSP (digital signal processing) development board central processing unit 1, an SD card 2, a voice chip 3, a function key 4, a number key 5, a digital tube 6, a liquid crystal display 7, and an earphone 8, wherein the DSP development board central processing unit 1 is internally provided with an SD card storage module 11, a key module 12, a sweep frequency tone test module 13, a liquid crystal display module 14, an audio processing module 15, and an audio playing module 16.
The shell is internally provided with a DSP development board central processing unit 1, an SD card 2 and a voice chip 3, and is provided with a function key 4, a digital key 5, a nixie tube 6, a liquid crystal display screen 7 and an earphone 8.
The SD card storage module 11 is used to store various therapeutic sound signals of various frequency bands, including narrow-band noise, white noise, speech noise, natural noise, etc. via the SD card 2.
The key module 12 is used for selecting a treatment mode and a treatment sound signal stored by the SD card 2 through the function keys 4, inputting tinnitus frequency for a frequency sweep test and feeding back a tinnitus frequency matching result and a tinnitus loudness matching result through the number keys 5, and realizing detection of the tinnitus condition of the user, wherein the treatment mode comprises an octave mode and a third octave mode.
The sweep frequency tone test module 13 is used for generating pure tones with different frequencies and different loudness according to the input tinnitus frequency by adopting sweep frequency tone test, performing tinnitus frequency matching and tinnitus loudness matching on the user, and matching to obtain the tinnitus frequency and tinnitus loudness of the user.
The nixie tube 6 is used for displaying the input tinnitus frequency.
The liquid crystal display module 14 is used for displaying the operation prompt, the treatment sound signal and the frequency sweeping sound test result through the liquid crystal display screen 7.
The audio processing module 15 is used for performing audio processing according to the selected therapeutic sound signal and therapeutic mode and the tinnitus frequency and tinnitus loudness obtained by matching, so as to obtain a final synthesized therapeutic sound signal.
The audio playing module 16 is used for playing the finally synthesized therapeutic sound signal and pure tones with different frequencies and different loudness for the frequency sweep tone test through the voice chip 3.
The earpiece 8 is used to output the resulting synthesized therapeutic acoustic signal and different frequencies of different loudness of pure tones for the swept tone test.
In a preferred embodiment, the swept frequency tone test module 13 includes a tinnitus frequency matching unit and a tinnitus loudness matching unit.
The tinnitus frequency matching unit is used for automatically generating pure sound (set to 125Hz) with the frequency far lower than the subjective tinnitus frequency of a user according to the input tinnitus frequency, setting a plurality of frequencies (set to 30 frequencies by equal frequency multiplication of the invention) between octaves with octaves as intervals on the basis of the frequency, automatically generating pure sound with corresponding frequency in real time to carry out tinnitus frequency matching test, and matching to obtain the tinnitus frequency closest to the tinnitus tone of the user.
The tinnitus loudness matching unit is used for automatically generating pure sound (5 dB) with loudness far lower than the subjective tinnitus loudness of a user according to preset tinnitus frequency, carrying out tinnitus loudness matching test at intervals of 1dB on the basis of the loudness, and matching to obtain the tinnitus loudness of the user.
In a preferred embodiment, as shown in fig. 3(a) to 3(f), the audio processing module 15 includes a signal modulation unit 151, a fourier transform unit 152, a notch filtering unit 153, and an inverse fourier transform unit 154.
The signal Modulation unit 151 is configured to generate a sinusoidal carrier signal with a frequency matching the obtained tinnitus frequency according to the selected therapeutic sound signal, and "linearly shift" the therapeutic sound spectrum to a vicinity of the detected tinnitus frequency by AM Modulation (Amplitude Modulation) to obtain a therapeutic sound after signal Modulation, thereby realizing shifting of the therapeutic sound signal spectrum.
The fourier transform unit 152 is configured to perform fourier transform on the therapeutic sound after signal modulation, so as to obtain a frequency spectrum of the therapeutic sound after signal modulation.
The notch filtering unit 153 is configured to perform corresponding notch filtering according to the frequency spectrum of the fourier transform therapeutic sound and the selected therapeutic mode to obtain the frequency spectrum of the therapeutic sound synthesized after notch filtering, and after the same audio frequency is subjected to notch filtering processing in different octaves, that is, in different therapeutic modes, the notch frequency spectrum bandwidths of the audio frequency are different.
The inverse fourier transform unit 154 is configured to perform inverse fourier transform on the frequency spectrum of the therapeutic sound synthesized after the trace filtering to obtain a time domain signal of the final therapeutic sound, where the time domain signal is the final synthesized therapeutic sound signal, and the loudness of the therapeutic sound signal is the loudness of the tinnitus obtained through matching.
In a preferred embodiment, the audio playing module 16 includes a voice chip unit 161 and a volume control unit 162.
The voice chip unit 161 is used for playing the finally synthesized therapeutic sound signal and pure tones with different frequencies and loudness for the sweep tone test through the voice chip 3.
The volume control unit 162 is used for controlling the volume of the finally synthesized therapeutic sound signal through the digital key 5 according to the conversion of the gain and the amplification factor.
As shown in fig. 2, the method for using the tinnitus treatment apparatus of the present invention is described in detail by the following embodiments:
1) the liquid crystal display module 14 displays a startup interface through the liquid crystal display 7, and a user inputs the tinnitus frequency of the sweep tone test through the digital keys 5 and displays the tinnitus frequency through the nixie tube 6.
2) Sweep frequency sound test module 13 adopts the sweep frequency sound to test, according to the tinnitus frequency of input, generates the pure tone of the different loudness of different frequencies, carries out tinnitus frequency matching and tinnitus loudness matching to the user, and the user feeds back tinnitus frequency matching result and tinnitus loudness matching result through button module 12, and then matches and obtain tinnitus frequency and tinnitus loudness to show through liquid crystal display 7, specifically do:
2.1) the tinnitus frequency matching unit automatically generates pure sound with frequency far lower than the subjective tinnitus frequency of the user according to the input tinnitus frequency, and sets a plurality of frequencies by using octaves as intervals on the basis of the frequency and frequency doubling between the octaves, and automatically generates pure sound with corresponding frequency in real time to perform tinnitus frequency matching test:
in the tinnitus frequency matching test process, the voice chip unit 161 plays the pure tones with different frequencies for the sweep tone test through the voice chip 3, the user wears the earphone 8 to listen, and if the pure tone with a certain frequency is considered as the self tinnitus frequency, the pure tone with a certain frequency is determined through the function key 4; otherwise, after the pure tone of the frequency is played, the pure tone of the next frequency is listened to until the tinnitus frequency closest to the tinnitus tone of the user is obtained through matching.
2.2) the tinnitus loudness matching unit automatically generates pure sound with loudness far lower than the subjective tinnitus loudness of the user according to the preset tinnitus frequency, and carries out tinnitus loudness matching test with 1dB as the interval on the basis of the loudness:
in the tinnitus loudness matching test process, the voice chip unit 161 plays pure tones with different loudness for frequency sweep tone test through the voice chip 3, the user wears the earphone 8 to listen, and if the pure tone with certain loudness is considered as the own tinnitus loudness, the pure tone is determined through the function key 4; and if not, listening to the pure tone of the next loudness after the pure tone of the loudness is played until the tinnitus loudness closest to the user loudness is obtained through matching.
2.3) the liquid crystal display module 14 displays the tinnitus frequency and tinnitus loudness obtained by matching through the liquid crystal display 7.
3) The user selects the treatment mode and the treatment sound signals stored by the SD card 2 through the function keys 4 and sends the treatment sound signals to the audio processing module 15, wherein the treatment mode and the treatment sound signals are selected by the user according to the self condition.
4) The user inputs the tinnitus center frequency through the number keys 5, namely the tinnitus frequency obtained by matching.
5) The audio processing module 15 performs audio processing according to the selected therapeutic sound signal and therapeutic mode and the tinnitus frequency and tinnitus loudness obtained by matching, to obtain a final synthesized therapeutic sound signal, wherein a schematic diagram of the audio processing is shown in fig. 3, specifically:
5.1) the signal modulation unit 151 generates a sine carrier signal with the frequency being the tinnitus frequency obtained by matching according to the selected therapeutic sound signal, and linearly shifts the therapeutic sound frequency spectrum to be close to the tinnitus frequency obtained by matching through AM modulation to obtain the therapeutic sound after signal modulation.
5.2) the Fourier transform unit 152 performs Fourier transform on the treatment sound after signal modulation to obtain the frequency spectrum of the treatment sound after signal modulation.
5.3) the notch filtering unit 153 performs corresponding notch filtering according to the frequency spectrum of the therapeutic sound after signal modulation and the selected therapeutic mode to obtain the frequency spectrum of the therapeutic sound after notch filtering:
5.3.1) setting the tinnitus frequency matched by the frequency sweep tone testing module 13 to be f.
5.3.2) when the selected treatment mode is an octave mode, the notch filtering is an octave filtering, and the lower cut-off frequency of the octave filtering is according to the formula
The upper limit cut-off frequency of one octave filtering is obtained by calculation according to a formula
And (4) calculating.
5.3.3) when the selected treatment mode is one-third octave mode, the notch filtering is one-third octave filteringThe lower cut-off frequency of one-third octave filtering is according to the formula
The upper limit cut-off frequency of one-third octave filtering is obtained by calculation according to a formula
And (4) calculating.
5.3.4) the signal output is the frequency spectrum of the synthesized therapeutic sound after notch filtering.
And 5.4) the inverse Fourier transform unit 154 performs inverse Fourier transform on the frequency spectrum of the therapeutic sound synthesized after the trace filtering to obtain a time domain signal of the final therapeutic sound, wherein the time domain signal is the final synthesized therapeutic sound signal, and the loudness of the therapeutic sound signal is the loudness of the tinnitus obtained by matching.
6) The audio playing module 16 plays the finally synthesized therapeutic sound signal through the voice chip 3, and adjusts the volume through the digital keys 5.
7) The earphone 8 outputs the finally synthesized therapeutic sound signal, and the tinnitus patient hears the therapeutic sound signal output by the earphone 8 by wearing the earphone 8 to treat.
The above embodiments are only used for illustrating the present invention, and the structure, connection mode, manufacturing process, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.
Claims (10)
1. A tinnitus therapeutic apparatus is characterized by comprising a shell, a central processing unit, an SD card, a voice chip, a key, a nixie tube, a liquid crystal display screen and an earphone;
the central processing unit, the SD card and the voice chip are arranged in the shell, and the key, the nixie tube, the liquid crystal display screen and the earphone are arranged on the shell;
the SD card is used for storing various treatment sound signals of various frequency bands;
the button is used for selecting a treatment mode and a treatment sound signal stored by the SD card, inputting tinnitus frequency and feeding back a tinnitus frequency matching result and a tinnitus loudness matching result;
the central processing unit is used for performing tinnitus frequency matching and tinnitus loudness matching on a user according to input tinnitus frequency by adopting a sweep frequency tone test, and performing audio processing according to the selected treatment sound and treatment mode and the tinnitus frequency and tinnitus loudness obtained by matching to obtain a finally synthesized treatment sound signal;
the nixie tube is used for displaying the input tinnitus frequency;
the liquid crystal display screen is used for displaying operation prompts, treatment sound information and frequency sweeping sound test results;
the voice chip is used for playing the finally synthesized therapeutic sound signal;
the earphone is used for outputting the finally synthesized therapeutic sound signal.
2. The tinnitus treatment apparatus of claim 1 wherein said central processor is internally provided with:
the SD card storage module is used for storing various treatment sound signals of various frequency bands through the SD card;
the key module is used for selecting a treatment mode and a treatment sound signal stored by the SD card through the key, inputting tinnitus frequency and feeding back a tinnitus frequency matching result and a tinnitus loudness matching result;
the sweep frequency tone testing module is used for generating pure tones with different frequencies and different loudness according to the input tinnitus frequency by adopting sweep frequency tone testing, performing tinnitus frequency matching and tinnitus loudness matching on a user, and matching to obtain the tinnitus frequency and the tinnitus loudness of the user;
the liquid crystal display module is used for displaying operation prompts, treatment sound information and frequency sweeping sound test results through the liquid crystal display screen;
the audio processing module is used for carrying out audio processing according to the selected therapeutic sound signal and the therapeutic mode and the tinnitus frequency and the tinnitus loudness obtained by matching to obtain a finally synthesized therapeutic sound signal;
and the audio playing module is used for playing the finally synthesized therapeutic sound signal and pure tone for the sweep frequency tone test through the voice chip.
3. The tinnitus treatment instrument of claim 1 wherein said sweep tone test module comprises:
the tinnitus frequency matching unit is used for automatically generating pure tones of corresponding frequencies according to the input tinnitus frequency, setting a plurality of frequencies by using octave intervals as intervals on the basis of the frequencies and equal frequency multiplication between the octave intervals, automatically generating the pure tones of the corresponding frequencies in real time to perform tinnitus frequency matching test, and matching to obtain the tinnitus frequency of a user;
and the tinnitus loudness matching unit is used for automatically generating pure sound corresponding to the loudness according to the preset tinnitus frequency, carrying out tinnitus loudness matching test by taking a preset decibel value as an interval on the basis of the loudness, and matching to obtain the tinnitus loudness of the user.
4. The tinnitus treatment apparatus of claim 1 wherein said audio processing module comprises:
the signal modulation unit is used for generating a sine carrier signal with the frequency matched with the obtained tinnitus frequency according to the selected therapeutic sound signal and obtaining the therapeutic sound after signal modulation through AM modulation;
the Fourier transform unit is used for carrying out Fourier transform on the therapeutic sound after the signal modulation to obtain the frequency spectrum of the therapeutic sound after the signal modulation;
the notch filtering unit is used for carrying out corresponding notch filtering according to the frequency spectrum of the therapeutic sound after the signal modulation and the selected therapeutic mode to obtain the frequency spectrum of the therapeutic sound synthesized after the notch filtering;
and the inverse Fourier transform unit is used for performing inverse Fourier transform on the frequency spectrum of the therapeutic sound synthesized after the trace filtering to obtain a finally synthesized therapeutic sound signal, and the loudness of the therapeutic sound signal is the loudness of the tinnitus obtained through matching.
5. The tinnitus treatment apparatus of claim 1 wherein said button comprises:
the function key is used for selecting a treatment mode and a treatment sound signal stored by the SD card;
and the digital key is used for inputting tinnitus frequency and feeding back a tinnitus frequency matching result and a tinnitus loudness matching result.
6. The tinnitus treatment apparatus of claim 5 wherein said audio playback module comprises:
the voice chip unit is used for playing the finally synthesized therapeutic sound signal and the tinnitus frequency and tinnitus loudness obtained by matching through the voice chip;
and the volume control unit is used for controlling the volume of the finally synthesized therapeutic sound signal through the key module according to the conversion of the gain and the amplification factor.
7. A method of using a tinnitus treatment apparatus according to any one of claims 1 to 6 comprising the following:
1) the liquid crystal display screen displays a starting interface, and a user inputs tinnitus frequency through a key and displays the tinnitus frequency through a nixie tube;
2) the central processing unit adopts a sweep frequency sound test, pure sounds with different frequencies and different loudness are generated according to the input tinnitus frequency, tinnitus frequency matching and tinnitus loudness matching are carried out on a user, the user feeds back a tinnitus frequency matching result and a tinnitus loudness matching result through a key, and the tinnitus frequency and the tinnitus loudness are obtained through matching and are displayed through a liquid crystal display screen;
3) the user selects a treatment mode and a treatment sound signal stored by the SD card through a key and sends the treatment sound signal to the central processing unit;
4) the user inputs the tinnitus frequency obtained by matching through keys;
5) the central processing unit carries out audio processing according to the selected therapeutic sound signal and the therapeutic mode and the tinnitus frequency and the tinnitus loudness obtained by matching to obtain a finally synthesized therapeutic sound signal;
6) the voice chip plays the finally synthesized therapeutic sound signal and adjusts the volume through a key;
7) the earphone outputs the finally synthesized therapeutic sound signal, and the tinnitus patient listens to the therapeutic sound signal output by the earphone by wearing the earphone.
8. The use method of the tinnitus treatment apparatus as claimed in claim 7, wherein the specific process of step 2) is as follows:
2.1) the tinnitus frequency matching unit automatically generates pure tones with corresponding frequencies according to the input tinnitus frequency, octave intervals are used as intervals on the basis of the frequencies, a plurality of frequencies are set between the octave intervals in an equal frequency doubling manner, the pure tones with corresponding frequencies are automatically generated in real time to carry out tinnitus frequency matching test, and the tinnitus frequency of the user is obtained through matching;
2.2) the tinnitus loudness matching unit automatically generates pure sound corresponding to the loudness according to the preset tinnitus frequency, and performs tinnitus loudness matching test by taking a preset decibel value as an interval on the basis of the loudness, so as to obtain the tinnitus loudness of the user through matching;
and 2.3) the liquid crystal display module displays the tinnitus frequency and the tinnitus loudness obtained by matching through a liquid crystal display screen.
9. The use method of the tinnitus treatment apparatus as claimed in claim 7, wherein the specific process of step 5) is as follows:
5.1) the signal modulation unit generates a sine carrier signal with the frequency matched with the obtained tinnitus frequency according to the selected therapeutic sound signal, and obtains the therapeutic sound after signal modulation through AM modulation;
5.2) carrying out Fourier transform on the treatment sound after signal modulation by a Fourier transform unit to obtain the frequency spectrum of the treatment sound after signal modulation;
5.3) the notch filtering unit carries out corresponding notch filtering according to the frequency spectrum of the therapeutic sound after signal modulation and the selected therapeutic mode to obtain the frequency spectrum of the therapeutic sound synthesized after notch filtering;
and 5.4) carrying out Fourier inverse transformation on the frequency spectrum of the therapeutic sound synthesized after the trace filtering by the Fourier inverse transformation unit to obtain a finally synthesized therapeutic sound signal, wherein the loudness of the therapeutic sound signal is the loudness of the tinnitus obtained by matching.
10. The use method of the tinnitus treatment apparatus as claimed in claim 9, wherein the specific process of step 5.3) is as follows:
5.3.1) setting the tinnitus frequency obtained by matching the frequency sweeping tone testing module to be f;
5.3.2) when the selected treatment mode is an octave mode, the notch filtering is an octave filtering, and the lower cut-off frequency of the octave filtering is according to the formula
The upper limit cut-off frequency of one octave filtering is obtained by calculation according to a formula
Calculating to obtain;
5.3.3) when the selected treatment mode is one third octave mode, the notch filtering is one third octave filtering, and the lower limit cut-off frequency of the one third octave filtering is according to the formula
The upper limit cut-off frequency of one-third octave filtering is obtained by calculation according to a formula
Calculating to obtain;
5.3.4) the signal output is the frequency spectrum of the synthesized therapeutic sound after notch filtering.
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