摘要
目的 探讨人工耳蜗装置中刺激速率的改变对人工耳蜗植入者在噪声环境下对广东话声调认知能力的影响。 方法 受试对象为18例以广东话为母语的成人人工耳蜗植入者。实验选取1515,800和400脉冲/秒/通道以分别代表高、中、低3种不同刺激速率。在随机选取一种刺激速率后,患者需要在安静及不同信噪比的噪声环境下分别完成对广东话声调辨别能力及识别能力的测试。结果 在安静及不同信噪比的噪声环境下,两项声调认知能力测试的成绩均随刺激速率的减低而下降。在0,+5及+10的信噪比下,高速率刺激与低速率刺激下的声调辨别能力的测试成绩存在显著性差异。在-5及0的信噪比下,高速率刺激与低速率刺激下的声调识别能力测试成绩存在显著性差异。结论 高速率刺激可以为人工耳蜗植入者提供更好的时间信息,有助于提高在噪声环境下的广东话声调认知能力。
Objective To evaluate the effects of stimulation rate on cantonese tone perception performance against abackground noise by cantonese-speaking cochlear implant users. Methods Eighteen adult cantonese-speakers with cochlear implantationparticipated in this study. All subjects had at least six-month experience in using the MED-EL tempo+ cochlear implant device withthe continuous interleaved sampling speech coding strategy. Three stimulation rates of 1515, 800 and 400 pulses per second per channelwere selected to represent high, moderate and low stimulation rate conditions, respectively. Two speech tests-tone discrimination testand tone identification test were used to evaluate the effects of stimulation rate in this study. After being randomly assigned to eachof the stimulation rate, the subjects were required to listen to a randomized list of speech tests presented in quiet and against abackground noise of different signal-to-noise ratios. Results High stimulation rate resulted in better tone perception than lowstimulation rate. For the tone discrimination test, significant differences were observed between high and low stimulation rates atsignal-to-noise ratios of 0, +5, and +10 dB. For the tone identification test, there were significant differences between high and lowstimulation rates at signal-to-noise ratios of -5 and 0 dB. Conclusion A high stimulation rate may provide better temporal and spectralinformation, which is important for cantonese tone perception against a background noise. '
出处
《中国听力语言康复科学杂志》
2004年第3期7-9,共3页
Chinese Scientific Journal of Hearing and Speech Rehabilitation
关键词
刺激速率
广东
人工耳蜗
声调
认知能力
言语测试材料
Cochlear implant
Noise
Stimulation rate
Tone discrimination test
Tone identification test
