CN106851511A - A kind of quick pure tone test method based on smart mobile phone - Google Patents

Abstract

The invention discloses a fast pure tone audiometry method based on a smart phone, which can also be called a "thick and fine focus" audiometry method. A digital hearing aid is used as an audio source for a pure tone test, and a smart phone is used as a man-machine interaction interface and an audiometry method. Program control generates single audio signals of different frequencies and loudness in the ear canal of hearing-impaired patients, and responds and analyzes whether the patient hears the sound and feels discomfort, and obtains the hearing threshold and discomfort threshold describing the patient's hearing condition. During the pure tone test, the man-machine interface including operation prompts and patient responses, and the instruction program for controlling the hearing aid run on the smart phone. The pure tone signal is generated by the digital hearing aid, and the smart phone controls the hearing aid through wireless communication with the hearing aid. Thus, pure tones of different frequencies and loudnesses are produced, and the patient's loudness of the sound, including whether it is heard or not, is collected and analyzed by the smart phone, and the hearing test is completed.

Description

A fast pure tone audiometry method based on smart phone

technical field

The invention belongs to an intelligent pure tone audiometry method in the field of digital hearing aid fitting, and specifically relates to a pure tone audiometry method based on the cooperative work of a smart phone and a hearing aid, including hearing threshold testing and discomfort threshold testing.

Background technique

In recent years, with the aggravation of the aging population in our country, hearing impairment has gradually become one of the main factors affecting the health of the elderly. Wearing hearing aids has become the main means for hearing-impaired people to improve their hearing. Studies have shown that wearing hearing aids can effectively alleviate the hearing loss of hearing-impaired patients and help patients improve their quality of life. Therefore, the quality of hearing aid fitting is directly related to the quality of life of patients, and pure tone testing is an important part of the fitting process. , the accuracy of the test is also directly related to the selection of fitting parameters, which will affect the fitting effect.

The results of the pure tone test reflect the smallest sound series of each frequency that the patient can hear in a quiet environment. The traditional pure tone test method is relatively cumbersome and requires the patient to go to a special hearing institution to complete it under the guidance of a doctor in a soundproof room, and the patient cannot complete it by himself. Throughout the hearing test process, the test method basically adopts the clinically more commonly used lifting method, which takes a long time, and the whole set of testing equipment is expensive, not portable, and requires long-term maintenance and calibration.

Hearing-impaired patients hope to have a simple pure tone test plan, which can enable patients to complete the pure tone test by themselves, shorten the time of pure tone test and improve the accuracy, so as to provide an accurate audiogram for the subsequent hearing aid fitting.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a fast pure tone audiometry method based on smart phones, which can also be called "thick and fine focus" audiometry. The present invention uses a digital hearing aid as the audio frequency of the pure tone test. Source, using the smart phone as the human-computer interface and the audiometry program control, generates single audio signals of different frequencies and loudness in the ear canal of the hearing-impaired patients, and responds and analyzes whether the patient hears the sound and feels discomfort, and obtains Describes the hearing threshold and discomfort threshold of the patient's hearing condition. During the pure tone test, the man-machine interface including operation prompts and patient responses, and the instruction program for controlling the hearing aid run on the smart phone. The pure tone signal is generated by the digital hearing aid, and the smart phone controls the hearing aid through wireless communication with the hearing aid. In this way, pure tones of different frequencies and loudnesses are produced, and the patient's loudness of the sound, including whether it is heard or not, is collected and analyzed by the smart phone to complete the hearing test.

The purpose of the present invention is achieved through the following technical solutions:

A fast pure tone audiometry method based on a smart phone, comprising a smart phone, a digital hearing aid, and a "thick and fine focus" pure tone test program, the "thick and fine focus" pure tone test program including an hearing threshold test and an uncomfortable threshold test, the audiometry method Include the following steps:

(1) The subject wears digital hearing aids on the left and right ears, and the pure tone test program uses the smartphone as the operating platform, and sends frequency and loudness commands to the hearing aids through wireless communication technology;

(2) After the digital hearing aid receives the command, it analyzes the content of the command and generates a pure tone corresponding to the frequency and loudness;

(3) Test the listener according to the test principle of first testing the left ear, then testing the right ear; first hearing the threshold test, and then the uncomfortable threshold test; after the test is completed, output the test results on the smart phone and display the tested hearing type of hearing loss.

The process steps for digital hearing aids to generate pure tones are as follows:

(1) The digital hearing aid listens to the control instructions of the smartphone, and analyzes the frequency and loudness information contained in the instructions;

(2) Use the frequency information to call the sine wave samples stored in the digital hearing aid, and adjust the amplitude of the sine wave samples according to the loudness information in the command;

(3) The adjusted sine wave is converted into an analog sine wave signal by a digital-to-analog converter, and finally output through a loudspeaker to generate a pure tone corresponding to frequency and loudness.

The hearing threshold test procedure is as follows:

(1) Set the test frequency sequence as 1000Hz, 2000Hz, 4000Hz, 8000Hz, 500Hz, 250Hz; the loudness range of the test pure tone is 10~90dBHL;

(2) Carry out the hearing threshold test for the listener under the test frequency in the above steps in turn, first enter the coarse tuning mode, and the pure sound level gradually increases from 10dB, and the step size of each increase is 5dB, and the pure tone of each loudness The playing time is 800ms;

(3) When the subject hears the pure tone, the coarse tuning mode ends, and a rough hearing threshold is generated;

(4) Enter the fine-tuning mode, subtract 15dB from the rough hearing threshold, then increase the loudness with 5dB as a step, until the rough hearing threshold is reached, and the pure tone playing time of each loudness is 3s;

(5) When the patient hears the pure tone again, record it as the hearing threshold at the current frequency.

The testing process of discomfort threshold is as follows:

(1) Set the test frequency sequence as 1000Hz, 2000Hz, 4000Hz, 8000Hz, 500Hz, 250Hz; the loudness range of the test pure tone is 20~110dBHL;

(2) Perform the discomfort threshold test on the listener at the test frequency in the above steps in turn, the pure sound level increases from 20dB, the step size of each increase is 5dB, and the pure tone playback time of each loudness is 1s ;

(3) When the patient feels discomfort, it is recorded as the discomfort threshold at this frequency.

Compared with the prior art, the beneficial effects brought by the technical solution of the present invention are:

The method of the invention can run the self-developed "thick and fine focus" pure tone test program into the smart phone, and control the digital hearing aid through wireless communication technology, such as bluetooth low power consumption. At this time, the digital hearing aid acts as a "pure tone audiometer" to generate pure tones of different frequencies and loudness. Patients only need to click the corresponding button control on the mobile phone interface according to the hearing situation to complete the pure tone test by themselves. This method does not require the intervention of an audiologist, and does not require a special trip to a hospital or hearing institution, which greatly facilitates the audiometry process of hearing-impaired patients and reduces the cost of audiometry.

Description of drawings

Fig. 1 is a schematic diagram of the system structure of the present invention.

Fig. 2 is a schematic flow chart of generating a pure tone signal at the digital hearing aid side.

Fig. 3 is a specific implementation flow chart of the "thick and fine focusing" method of the monaural hearing threshold test part in the present invention.

Fig. 4 is a specific implementation flow chart of the single ear discomfort threshold test method in the present invention.

Fig. 5 is the test result of the present invention.

detailed description

Below in conjunction with accompanying drawing, the present invention will be further described:

Fig. 1 is a systematic structural diagram of the smart phone-based fast pure tone audiometry method of the present invention. The system of the smart phone-based "thick and fine focus" pure tone audiometry solution includes a smart phone, a digital hearing aid, and a "thick and fine focus" pure tone test program. As shown in the figure, during the test, the patient wears digital hearing aids on the left and right ears. The "thick and fine focus" pure tone test program uses the smartphone as the operating platform to send frequency and loudness commands to the hearing aids through wireless communication, and the hearing aids receive After receiving the command, analyze the content of the command and generate the corresponding pure tone. The test process is based on the principle of testing the left ear first, then the right ear, and the hearing threshold test first, and then the discomfort threshold test. After the test is completed, the system will display the Output the audiogram on the computer, and automatically calculate the degree of hearing loss of the patient.

The "coarse and fine focusing" pure tone test program in this embodiment runs in the smartphone operating system, including hearing threshold test and discomfort threshold test. During the test, the patient wears the supporting digital hearing aid, responds to whether the sound is heard and whether the sound produces discomfort according to the operation prompts, and presses the response button on the pure tone test interface of the mobile phone to complete the hearing test. The test results will be output in the form of audiogram, which contains the hearing threshold and discomfort threshold information of the tested ear. The test frequency range is 250Hz to 8000Hz, and pure tone signals are generally generated at 250Hz, 500Hz, 1000Hz, 2000Hz, 4000Hz, 8000Hz Wait for the audio to click on.

In the present invention, wireless communication technology, such as Bluetooth low-power wireless communication technology, is used to realize the interconnection between the smart phone and the digital hearing aid. The smart phone uses a wireless link to send instructions to the digital hearing aid to control the frequency and frequency of pure tones generated by the digital hearing aid. loudness. So far, the pure tone test program can be completed by the patient himself, and it is convenient to carry.

Fig. 2 is a flow chart of generating a pure tone signal at the digital hearing aid side in the present invention. The digital hearing aid listens to the control command of the smartphone, analyzes the frequency and loudness information contained in the command, uses the frequency information to call the sine wave sample written in advance in the memory of the digital hearing aid, and adjusts the amplitude of the sine wave sample according to the loudness information in the command , and finally the adjusted sine wave is converted into an analog sine wave signal by a digital-to-analog converter (DAC) and output through a receiver (speaker), generating a pure tone corresponding to frequency and loudness. In this embodiment, the digital hearing aid is used as a "pure tone audiometer" to produce different frequencies and pure tones of different loudness. The models and parameters of the digital hearing aid processor (DSP), digital-to-analog converter (DAC) and loudspeaker used are Deterministic and controllable, and uniformly calibrated at the factory, it fundamentally solves the problem that the pure tone signal strength cannot be calibrated and the accuracy of the test results is difficult to guarantee due to the different earphone models and parameters selected by different smartphone manufacturers.

Fig. 3 is the specific implementation process of the "thick and fine focus" method of the single ear hearing threshold test part in the present invention. The patient enters the pure tone test program. In this embodiment, the hearing threshold test of the left ear is first carried out as an example. The order of the test frequency is 1000Hz, 2000Hz , 4000Hz, 8000Hz, 500Hz, 250Hz. The loudness range of the pure tone to be tested is 10-90dBHL. At the beginning of the test, the hearing threshold test of 1000Hz is carried out first. Enter the coarse tuning mode, the pure sound level will gradually increase from 10dB, and the step size of each increase is 5dB, and the pure tone playback time of each loudness is 800ms, that is, the total time of playing the pure tone from 10 to 90dBHL needs 13.6s. , when the patient hears the pure tone, click the "I Hear" button, then the coarse adjustment mode ends and a rough hearing threshold is generated. At this time, the system enters the fine adjustment mode. Subtract 15dB from above, and still increase the loudness with a step of 5dB until it reaches the rough hearing threshold estimated before. Press the "I Hear" button, and it will be recorded as the hearing threshold at the current frequency. Similarly, patients can quickly complete the hearing threshold test of other frequencies, which greatly reduces the duration of the hearing threshold test. The combination of "coarse adjustment" and "fine adjustment" also ensures the accuracy of the pure tone test.

Figure 4 shows the discomfort threshold test process in the present invention. The discomfort threshold test process is relatively simple. The system first automatically enters the left ear discomfort test. The order of test frequencies is 1000Hz, 2000Hz, 4000Hz, 8000Hz, 500Hz, and 250Hz. The loudness of the test sound ranges from 20 to 110dBHL. At the beginning of the test, the discomfort threshold test of 1000Hz is performed first. The pure sound level increases from 20dB, and the step size of each increase is 5dB. The pure tone of each loudness is played for 1s. When the patient feels uncomfortable, click the "too loud" button in the test interface, and it will be recorded as the discomfort threshold at that frequency. Similarly, the patient can quickly complete the discomfort threshold test at other frequencies.

Fig. 5 is the pure tone test result of the present invention, output in the form of an audiogram, in the figure, "x" represents the hearing threshold of the left ear, and "o" represents the hearing threshold of the right ear. "U" represents the discomfort threshold, where ① represents the discomfort threshold of the left ear, and ② represents the discomfort threshold of the right ear. The application automatically calculates the degree of hearing loss of the patient and displays it on the application interface.

The present invention is not limited to the embodiments described above. The above description of the specific embodiments is intended to describe and illustrate the technical solution of the present invention, and the above specific embodiments are only illustrative and not restrictive. Without departing from the gist of the present invention and the scope of protection of the claims, those skilled in the art can also make many specific changes under the inspiration of the present invention, and these all belong to the protection scope of the present invention.

Claims (4)

1. a kind of quick pure tone test method based on smart mobile phone, including smart mobile phone, digital deaf-aid and " thickness focusing " Pure tone test program, it is characterised in that " thickness focusing " the pure tone test program includes threshold of audibility test and thresholds of uncomfortable level test, The audiometry method is comprised the following steps：

(1) be tested hearer digital deaf-aid is worn on left and right ear, thickness focusing " pure tone test program with smart mobile phone make It is operation platform, is instructed to audiphone transmission frequency and loudness by wireless communication technology；

(2) after digital deaf-aid receives instruction, analysis instruction content produces the pure tone of respective frequencies and loudness；

(3) according to left ear is first tested, auris dextra is tested afterwards；First threshold of audibility test, the test principle of rear thresholds of uncomfortable level test is to by audiometry Person is tested；Output test result on smart mobile phone after being completed, and show the deafness of tested hearer.

2. a kind of quick pure tone test method based on smart mobile phone according to claim 1, it is characterised in that step (2) Middle digital deaf-aid produces the process step of pure tone as follows：

(1) digital deaf-aid monitors the control instruction of smart mobile phone, the frequency and loudness information included in analysis instruction；

(2) frequency information, the sine wave sample of call number audiphone memory storage are utilized, and is adjusted according to the loudness information in instruction Amplitude in whole sine wave sample；

(3) that by digital analog converter the sine wave after adjustment is converted into analog sine wave signal is final defeated via loudspeaker Go out, produce the pure tone of respective frequencies and loudness.

3. a kind of quick pure tone test method based on smart mobile phone according to claim 1, it is characterised in that the survey of the threshold of audibility Examination process is as follows：

(1) setting test frequency order is 1000Hz, 2000Hz, 4000Hz, 8000Hz, 500Hz, 250Hz；Test the sound of pure tone Degree scope is 10~90dBHL；

(2) threshold of audibility test is carried out to tested hearer under test frequency successively in above-mentioned steps, is introduced into coarse mode, pure tone Loudness is started to step up from 10dB, and each increased step-length is 5dB, and the pure tone playing duration of each loudness is 800ms；

(3) after tested hearer hears pure tone, coarse mode terminates, and produces a rough threshold of audibility；

(4) enter fine mode, 15dB is subtracted on the basis of the rough threshold of audibility, increase loudness by step-length of 5dB afterwards, directly The rough threshold of audibility is reached, the pure tone playing duration of each loudness is 3s；

(5) after patient hears pure tone again, then it is recorded as listening threshold value under current frequency.

4. a kind of quick pure tone test method based on smart mobile phone according to claim 1, it is characterised in that thresholds of uncomfortable level Test process it is as follows：

(1) setting test frequency order is 1000Hz, 2000Hz, 4000Hz, 8000Hz, 500Hz, 250Hz；Test the sound of pure tone Degree scope is 20~110dBHL；

(2) thresholds of uncomfortable level test is carried out under test frequency successively in above-mentioned steps to tested hearer, pure tone loudness is from 20dB Start to be incremented by, each increased step-length is 5dB, and the pure tone playing duration of each loudness is 1s；

(3) when patient feels it is uncomfortable when, then be recorded as the thresholds of uncomfortable level under the frequency.