Practical Application Of Microphone Array Speech Enhancement Technology In Hearing AIDS

Sound is one of the most convenient and reliable ways for humans to obtain outside information.Patients with hearing loss are defective or injured because of their own auditory system.They can get very limited voice information.Therefore,it is necessary to use hearing aids and other medical devices to make up for the lack of hearing system.However,the existing hearing aids products have great defects in noise suppression.This greatly affects the user experience when hearing impaired patients are in use.Therefore,how to effectively suppress the noise in hearing aids is an urgent problem to be solved.Microphone array speech enhancement technology as a new method of speech enhancement in recent years.Compared to the traditional single microphone method.Microphone array technology introduces the idea of spatial filtering,which makes it have better spatial resolution and anti-interference ability in dealing with complex noise environment such as multiple noise sources.Microphone array speech enhancement technology has gradually become the mainstream of development.The main content of this paper is to study the speech enhancement technique is based on microphone array.Through the study on the related algorithm analysis,its application in digital hearing aids.Aiming at the problems of the existing algorithms,the corresponding improvement measures are put forward to further improve the technology.In this paper,firstly,the related theory of microphone array speech enhancement technology is expounded,which is the basis for future research.Then the advantages and disadvantages of the four most classical microphone array algorithms are analyzed and compared.An equivalent implementation of GSC as an adaptive beamforming method.Because of its simple structure and adaptive adjustment of filter direction,it meets the needs of hearing aids.Therefore,this method is applied to digital hearing aids.To some extent,the speech quality of hearing aids is enhanced.However,the traditional GSC method has many defects.In this paper,a series of improvement measures are proposed,and an improved GSC algorithm is designed on the basis of the original framework.Analysis and verification of the algorithm in different noise environments.The improved algorithm improves the estimation accuracy of the signal arrival direction and arrival time difference,reduces the order of the adaptive filter,and solves the defect of the lack of incoherent noise processing ability.The improved GSC algorithm has better noise suppression ability.This paper introduces the research status of microphonearray.The algorithm of microphone array speech enhancement is given.The GSC algorithm and filter algorithm and simulation is carried out to verify the relevant.