Psychophysical Performance and Mandarin Tone Recognition in Noise by Cochlear Implant Users

Wei, Chaogang; Cao, Keli; Jin, Xin; Chen, Xiaowei; Zeng, Fan‐Gang

doi:10.1097/aud.0b013e318031512c

Cited by 45 publications

(55 citation statements)

References 19 publications

(27 reference statements)

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“…Consistent with what is known about complex pitch perception, it has been shown that the greater the amount of spectral detail available to normal hearing listeners, the better their performance in tone recognition (Luo and Fu, 2006;Lin et al, 2007). Using acoustic stimuli, Wei et al (2007) have shown correlations between measures of spectral (pure-tone frequency discrimination) and temporal processing (gap detection), and lexical tone recognition in noise by cochlear implant users. Studies of speech intonation processing in English have revealed that CI listeners are able to process intonation cues in speech to some extent (Green et al, 2004(Green et al, ,2005.…”

Section: Lexical Tone and Intonation Recognition With Cochlear Implantsmentioning

confidence: 76%

Processing F0 with cochlear implants: Modulation frequency discrimination and speech intonation recognition

2008

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Fundamental frequency (F0) processing by cochlear implant (CI) listeners was measured using a psychophysical task and a speech intonation recognition task. Listeners' Weber fractions for modulation frequency discrimination were measured using an adaptive, 3-interval, forced-choice paradigm: stimuli were presented through a custom research interface. In the speech intonation recognition task, listeners were asked to indicate whether resynthesized bisyllabic words, when presented in the free field through the listeners' everyday speech processor, were question-like or statement-like. The resynthesized tokens were systematically manipulated to have different initial-F0s to represent male vs. female voices, and different F0 contours (i.e. falling, flat, and rising) Although the CI listeners showed considerable variation in performance on both tasks, significant correlations were observed between the CI listeners' sensitivity to modulation frequency in the psychophysical task and their performance in intonation recognition. Consistent with their greater reliance on temporal cues, the CI listeners' performance in the intonation recognition task was significantly poorer with the higher initial-F0 stimuli than with the lower initial-F0 stimuli. Similar results were obtained with normal hearing listeners attending to noiseband-vocoded CI simulations with reduced spectral resolution.

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Section: Lexical Tone and Intonation Recognition With Cochlear Implantsmentioning

confidence: 76%

Processing F0 with cochlear implants: Modulation frequency discrimination and speech intonation recognition

2008

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“…Mandarin-speaking normalhearing (NH) listeners can correctly identify Mandarin tones down to a signal-to-noise ratio (SNR) of À5 dB using steady, speech-shaped noise (Kong and Zeng, 2006). In contrast, although cochlear implant (CI) recipients achieve tone recognition scores ranging from about 50 to 70% correct in quiet (Wei et al, 2004;Luo et al, 2008), their performance drops markedly with decreasing SNR (Wei et al, 2007), and shows a high inter-subject variability. Therefore, improved F0-coding in CI speech processors (SPs) is of particular importance for tonal language speaking CI listeners.…”

Section: Introductionmentioning

confidence: 94%

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

et al. 2012

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“…Another problem that cochlear-implant patients face is poor perception of tonal information. This results in a diminished enjoyment of music (e.g., Fujita and Ito, 1999;Gfeller et al, 2002Gfeller et al, , 2007Kong et al, 2004;see also McDermott, 2004 for a review) and it is a major problem for people who speak tone languages (Zeng, 1995;Huang et al, 1995Huang et al, , 1996Sun et al, 1998;Wei et al, 2000Wei et al, , 2004Wei et al, , 2007Lee et al, 2002;Ciocca et al, 2002;Wong and Wong, 2004). The problem with music and lexical tone perception in cochlear implant users appears to stem from the same mechanism, that is, a limited number of spectral channels and a lack of encoding of fine structure information in the current implant systems (Smith et al, 2002;Xu and Pfingst, 2003).…”

Section: Introductionmentioning

confidence: 99%

Spectral and temporal cues for speech recognition: Implications for auditory prostheses

Pfingst

2008

Hearing Research

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Features of stimulation important for speech recognition in people with normal hearing and in people using implanted auditory prostheses include spectral information represented by place of stimulation along the tonotopic axis and temporal information represented in low-frequency envelopes of the signal. The relative contributions of these features to speech recognition and their interactions have been studied using vocoder-like simulations of cochlear implant speech processors presented to listeners with normal hearing. In these studies, spectral/place information was manipulated by varying the number of channels and the temporal-envelope information was manipulated by varying the lowpass cutoffs of the envelope extractors. Consonant and vowel recognition in quiet reached plateau at 8 and 12 channels and lowpass cutoff frequencies of 16 Hz and 4 Hz, respectively. Phoneme (especially vowel) recognition in noise required larger numbers of channels. Lexical tone recognition required larger numbers of channels and higher lowpass cutoff frequencies. There was a tradeoff between spectral/place and temporal-envelope requirements. Most current auditory prostheses seem to deliver adequate temporal-envelope information but the number of effective channels is suboptimal, particularly for speech recognition in noise, lexical tone recognition and music perception.

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Psychophysical Performance and Mandarin Tone Recognition in Noise by Cochlear Implant Users

Cited by 45 publications

References 19 publications

Processing F0 with cochlear implants: Modulation frequency discrimination and speech intonation recognition

Processing F0 with cochlear implants: Modulation frequency discrimination and speech intonation recognition

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

Spectral and temporal cues for speech recognition: Implications for auditory prostheses

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