人工電子耳進階結合編碼策略的中文語音辨識成效模擬--結合助聽器之分析

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人工電子耳進階結合編碼策略的中文語音辨識成效模擬--結合助聽器之分析

Modeling Advanced Combination Encoder Combined Acoustic Hearing For Chinese Speaking Patients Using Cochlear Implants

董書豪 , Masters　　Advisor：吳炤民　　

繁體中文

連續交替編碼策略；進階結合編碼策略；助聽器；人工電子耳； Cochlear implant ； Hearing aid ； Advanced Combination Encoders ； Continuous Interleaved Sampling

Abstract │ Reference (37) │ Times Cited (1) │ Altmetrics

Abstract 〈TOP〉

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The aim of this study is to simulate the cochlear implant (CI) with advanced combination encoding (ACE) strategy combined with low-frequency speech signal simulated hearing aid to evaluate their effects on Chinese word and tone recognition rates. Recent studies have shown that the effects of binaurally hearing will gain benefits on Chinese speech recognition. Previous study in our laboratory has confirmed that Chinese speech recognition rates could be improved with continuous interleaved sampling (CIS) strategy combined acoustic hearing. Because ACE strategy is the preferred speech encoding strategy for most of the CI recipients, we followed the same experimental environments of previous study and changed the speech strategy from CIS to ACE in this study. Signal noise ratio (SNR) of simulated cochlear implants signals were tuned to +4dB. Chinese word and tone recognition rates were evaluated in five normal-hearing (NH) subjects using ACE under three different conditions: 1) only simulated CI signals with modulated Gaussian white noise for monaural stimulation, 2) simulated CI signals with modulated Gaussian white noise and simulated (HA) signals (low-pass speech signals with cutoff frequency of 500 Hz) for monaural stimulation, and 3) simulated CI signals with modulated Gaussian white noise to one ear and simulated HA signals to the other ear for dichotic stimulation. For comparison purpose, Chinese word and tone recognition were also evaluated in four cochlear implant (CI) users of the Nucleus-24 device using ACE strategy and with contralateral hearing aid (HA). Preliminary results showed that the Chinese word and tone recognition rates of the NH listeners and CI recipients are statistically significantly improved (word recognition rates were improved from 39.6% to 65.6%, 69.2% to 96.8% for NH listeners and 13% to 27.8%, 54% to 78% for CI recipients). These results suggest that Chinese speech recognition could be enhanced if more speech information are provided from the HA to CI users and recognition rates are further improved with increasing amounts of frequency acoustic information.

Reference ( 37 ) 〈TOP〉

Blamey, P. J. , Dowell, R. C., Tong, Y. C., Brown, A. M., Luscombe, S. M., and Clark, G. M.(1984). "Speech processing studies using an acoustic model of a multiple-channel cochlear implant," J. Acoust. Soc. Am. 76, 104–110.
連結：
Ching, T. Y. , Incerti, P. , and Hill, M. (2004). "Binaural benefits for adults who use hearing aids and cochlear implants in opposite ears," Ear Hear. 25, 9–21.
連結：
Dorman, M. , Loizou, P. , Tu, Z, and Fitzke, J. (2000). "Recognition of sentences in noise by normal-hearing listeners using simulations of speak-type cochlear implant signal processors," Ann. Otol. Rhinol. Laryngol. Suppl. 185, 67–68.
連結：
Dorman, M. , Spahr, A. J., Loizou, P. C., Dana, C. J. , and Schmidt, J. S. (2005). "Acoustic Simulations of Combined Electric and Acoustic Hearing," Ear Hear. 26, 371–380.
連結：
Dorman, M. , Loizou, P. ,and Fitzke, J. (1998). "The identification of consonants and vowels by cochlear implants patients using a 6-channel CIS processor and by normal hearing listeners using simulations of processors with two to nine channels," Ear Hear. 19, 162–166.
連結：

Times Cited (1) 〈TOP〉

蔡偉林(2011)。以麥克風陣列與噪音消除為前處理的人工電子耳雙耳聽模擬在噪音環境下對中文語音辨識率之影響。中央大學電機工程學系學位論文。2011。1-94。

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