Design And Implementation Of Hearing Test And Compensation System Based On Mobile Terminal

With the rapid development of human society,people's daily life has been influenced by hearing impairment severely.The causes of auditory function problem are various,the number of hearing impairment people is increasing,lack of awareness of hearing protection and age increase make hearing impairment problem become more and more serious.Hearing impairment leads to normal language communication disorders directly.Because of this,social activities of hearing impaired patients become difficult.It makes them autism,mental disorder,even cause Alzheimer's disease.The quality of daily life of hearing impairment patients was affected seriously.So the problem of hearing impairment is one of the urgent problems to be solved.At present,wearing hearing aids is an effective way to solve the problem of hearing impairment.However,due to technical monopoly,fitting problems,lack of professional listening test instruments and other factors,the proportion of using hearing aids is only about 5%.And hearing aid user satisfaction is not high(about 71%).Therefore,improve people hearing protection consciousness,increase the convenience of listening test and the popularity of hearing aid,improve hearing aid effect have significant meanings to improve the quality of life of hearing impairment patients and the current situation of hearing impairment problem.In this paper,we based on the existing theory of hearing test and the theory of compensation for hearing aid,than design and implement the hearing test and hearing compensation system based on mobile terminal.The purpose is to improve the convenience of the general listening test and the people's consciousness of hearing protection.At the same time,the compensation algorithm of hearing aid is studied to improve the compensation effect.The main contents of this paper are as follows:1.The theoretical basis of hearing aid hearing test is studied,including the human auditory system,the contents and methods of hearing test,the classification of hearing impairment,and the treatment plans.2.The principle of loudness compensation algorithm for hearing aids is studied,and a new compensation algorithm is proposed to improve the intelligibility of speech and the ability of anti-noise.By enhancing the formant frequency and the spectrum contrast enhancement,the intelligibility of speech is improved.At the same time,the contrast enhancement of spectrum is also helpful to improve the signal-to-noise ratio of speech in noise background.3.This paper studies the principle of the common frequency-shifting hearing aid algorithm,and proposes a frequency compensation algorithm based on spectrum expansion and compensation processing to overcome the limitations of the original algorithm.The frequency compensation scheme is more adaptable and can be used to compensate for various types of hearing loss.And it can fit with the existing spectrum compression algorithm,and provide a new frequency compensation method for the patients who need frequency hearing aid.4.We design and implement the hearing test and compensation system based on the mobile terminal.Design and realize the hearing test system based on mobile terminal,including frequency resolution audiometry,speech audiometry test and etc.We study the basic principle and the detail process of each test,and design the test operation flow and interface with the characteristics of the mobile terminal.And design the hearing aid compensation function interface and the related parameter transfer format,and test the hearing test and hearing aid compensation system.