Perception of Mandarin Chinese with cochlear implants using enhanced temporal pitch cues

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• 作者：Matthias Milczynski^a ; ^{matthias.milczynski@gmail.com} ; Janice Erica Chang^b ; Jan Wouters^a ; Astrid van Wieringen^a
• 关键词：ACE ; advanced combination encoder ; ACF ; autocorrelation function ; CI ; cochlear implant ; CIS ; continuous interleaved sampling ; DubF0 ; Dubnowski F0 Extractor ; EH ; electric hearing ; FFT ; fast Fourier transform ; FAME ; frequency amplitude modulation encoding
• 刊名：Hearing Research
• 出版年：2012
• 期刊代码：111_03785955
• 类别：med
• 出版时间：March, 2012
• 卷：285
• 期：1-2
• 页码：1-12
• 文件大小：982 K

摘要

A cochlear implant (CI) signal processing strategy named F0 modulation (F0mod) was compared with the advanced combination encoder (ACE) strategy in a group of four post-lingually deafened Mandarin Chinese speaking CI listeners. F0 provides an enhanced temporal pitch cue by amplitude modulating the multichannel electrical stimulation pattern at the fundamental frequency (F0) of the incoming speech signal. Word and sentence recognition tests were carried out in quiet and in noise. The responses for the word-recognition test were further segmented into phoneme and tone scores. Off-line implementations of ACE and F0mod were used, and electrical stimulation patterns were directly streamed to the CI subject's implant. To focus on the feasibility of enhanced temporal cues for tonal language perception, idealized F0 information that was extracted from speech tokens in quiet was used in the F0mod processing of speech-in-noise mixtures. The results indicated significantly better lexical tone perception with the F0mod strategy than with ACE for the male voice (p < 0.05). No significant differences in sentence recognition were found between F0mod and ACE.