柯文俊Wen-Jiunn Ko, Ph.D臺灣大學:工程科學及海洋工程學研究所陳佳賢Chen, Jia-XianJia-XianChen2010-07-142018-06-282010-07-142018-06-282009U0001-0207200914352700http://ntur.lib.ntu.edu.tw//handle/246246/189001全球的聽障人士所占的人數已不在少數，大家也漸漸重視起這個議題。早前有聽障人協會及聽障相關的基金會等等來幫助聽障人士，而今有聽障奧運，可見得關於聽障這個議題的重要性。對於聽障人士而言，因為平常沒辦法聽到完整的語音訊號，故常造成學習與溝通上的困難，使我們對聽障人士常會產生誤解。由此可知，若我們想使聽力正常的人能透過某種工具聽到或感受到聽障人士可能聽到的語音，必定更加能去體會到聽障人士由於聽力損失所造成生活與學習上的不便，理解聽障人士其實跟一般人士沒什麼不一樣。也可以因此減少誤解，協助改善其因聽力損失所造成的問題。於耳蝸為聽覺系統最重要的部份，故本文的目標為利用數位濾波器組技術來設計耳蝸濾波器組，配合德州儀器所產的浮點式數位訊號處理入門者套件TMS320C6713 DSK(DSP Starter Kit)應用於模擬聽障人士可能聽見的語音。我們會先透過一些期刊或論文來熟悉耳蝸的特性，再利用符合耳蝸特性之珈瑪調濾波器組及主動式珈瑪啁啾濾波器組來模擬各種不同聽障程度損失的耳蝸聽覺機制，最後再利用軟體Matlab及硬體DSP晶片互相配合去驗證及實現聽障者之聽覺，達到能即時(real-time)且方便的目的，使聽力正常的人士能一樣的感受到聽障者的感覺，也能比較明確的知道聽障人士的真正需求為何。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.目錄 頁次文摘要 I文摘要 II錄 IV稱術語對照表 VIII目錄 IX目錄 XV號說明 XVI一章 緒論 1.1 研究背景與動機……………………………………………… 1.2 文獻回顧……………………………………………………… 3.3 論文架構……………………………………………………… 5二章 人耳之聽覺系統 7.1耳朵之生理構造及聲音之傳導途徑………………………… 7.1.1 外耳………………………………………………………… 8.1.2 中耳………………………………………………………… 9.1.3 內耳………………………………………………………… 10.2 等效矩形頻寬……………………………………………… 14.3 聽力圖………………………………………………………… 15.4 語音分析圖…………………………………………………… 16 三章 數位濾波器之理論與應用 18.1 數位濾波器…………………………………………………… 18.1.1 有限脈衝響應濾波器……………………………………… 18.1.2 無限脈衝響應濾波器……………………………………… 21.1.3 有限脈衝響應與無限脈衝響應之比較…………………… 25.2 珈瑪調濾波器………………………………………………… 26.2.1 珈瑪調FIR濾波器……………………………………………29.2.2 珈瑪調IIR濾波器……………………………………………32.3 珈瑪啁啾濾波器……………………………………………… 38.4 主動式珈瑪啁啾濾波器……………………………………… 44.4.1 主動式珈瑪啁啾FIR濾波器…………………………………48.4.2 主動式珈瑪啁啾IIR濾波器…………………………………52.5 選擇FIR或IIR近似濾波器之比較…………………………… 56 四章 珈瑪調及主動式珈瑪啁啾FIR濾波器組之設計 57.1 珈瑪調FIR濾波器組……………………………………………58.1.1 珈瑪調FIR濾波器組模擬無損失之聽覺系統………………59.1.2 珈瑪調FIR濾波器組模擬聽障者之聽覺系統………………64.2 主動式珈瑪啁啾FIR濾波器組…………………………………67.2.1 主動式珈瑪啁啾FIR濾波器組模擬無損失之聽覺系統……67.2.2 主動式珈瑪啁啾FIR濾波器組模擬聽障者之聽覺系統……68 五章 實驗系統架構與結果討論 70.1 DSP硬體實現平台………………………………………………70.1.1 數位訊號處理器…………………………………………… 71.1.2 程式編譯平台……………………………………………… 73.1.3 實驗架構…………………………………………………… 74.2 耳蝸濾波器組之驗證………………………………………… 75.3 硬體實現之模擬例…………………………………………… 84六章 結論與未來展望 105.1 結論……………………………………………………………105.2 展望……………………………………………………………107 考文獻 10911471276 bytesapplication/pdfen-US耳蝸珈瑪調濾波器組主動式珈瑪啁啾濾波器組數位訊號處理CochleaGammatone filter bankActive Gammachirp filter bankDigital Signal Processorthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/189001/1/ntu-98-R96525076-1.pdf