Application of Active Gammachirp Filter Banks to Simulate the Auditory Cochlea Mechanism of Hearing Impaired People on the DSP Chip
Date Issued
2009
Date
2009
Author(s)
Chen, Jia-Xian
Abstract
It is not a few hearing-impaired people globally and everyone pays greater attention to the subject gradually. There were Chinese National Association of the Deaf and hearing-impaired foundations to help the hearing-impaired people in the earlier days, and now a days the Deaf Olympic shows that the importance of hearing-impaired subject. As regards to the hearing-impaired people, due to being unable to perceive the complete voice signals, they might encounter many difficulties in learning and communication and drive regular people to get misunderstood. Accordingly, supposed a regular people can feel or really hear the voices which hearing-impaired people actually receive through some special instruments or tools, they can really experience some inconvenient problems of learing in life to know the difference between a regular and a hearing-impaired people. Thus mistakes are reduced to get help on improving the problems resulting from hearing-impaired.ecause the cochlea is the most important one of auditory system, this thesis is to design cochlea auditory filter banks by using the principle of digital filter banks to apply on the simulation of the voices actually received by the hearing-impaired people combining with digital signal processor TMS320C6713 DSK produced by Ti. We can first understand the feature of the cochlea by surveying the papers published in some journals involved, then use the gammatone filter bank and active gammachirp filter bank to simulate the different degree of hearing-impaired hearing loss of cochlear mechanisms. Finally we use the Matlab and DSP processor to approve and implement the sense of hearing of hearing-impaired people in real-time and convenient situations. Therefore, the fact as talked can make those people of normal hearing feel the sense of hearing-impaired people and also understand much more what the hearing-impaired people really need.
Subjects
Cochlea
Gammatone filter bank
Active Gammachirp filter bank
Digital Signal Processor
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-98-R96525076-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):2ffea5822e632e7d554450156bf5294b