摘要
目前对刺激速率是否影响电子耳蜗纯音频率分辨尚不清楚。分别开启基部和顶部4个电极,测试了刺激速率分别为250、720、900、1 200和2 400pps/ch(pulses per second per channel,pps/ch)的频率分辨率。共有11位佩戴Nucleus的ESPrit 3G言语处理器、并采用ACE(advanced combined encoder,ACE)处理策略的语后聋电子耳蜗植入者参与了实验。结果表明:1kHz以下纯音的频率分辨率要显著高于1kHz以上;刺激速率对纯音频率分辨率无显著影响。另外,与正常耳蜗对声刺激的响应不同,开启基部电极时高频段频率分辨率较低。进一步验证了刺激速率对无调语音识别无影响的相关研究结果。
The stimulation rate may possible improve the frequency discrimination of cochlear implants.The frequency discrimination was measured at stimulation rates of 250,720,900,1 200and 2 400 pps/ch（pulses per second per channel）to the four apical and basal electrodes.Eleven post-lingually deafened adults having the Nucleus cochlear implant with the ESPrit 3Gspeech processor using the ACE（advanced combined encoder）participated in the study.For each stimulation rate,the frequency discrimination below 1kHz was significantly higher than that above 1kHz.The stimulation rate had no significant difference on the frequency discrimination.In addition,the high-frequency discrimination with the basal electrodes was lower unlike a normal cochlea response to auditory signals.This further validates the findings of no significant effect of stimulation rate on atonal speech recognition.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第5期716-720,共5页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(60871083
30800234)
"十一五"国家科技支撑计划(2008BAI50B08)
北京市自然科学基金资助项目(3082012)
关键词
电子耳蜗
刺激速率
频率分辨
音调感知
cochlear implants
stimulation rate
frequency discrimination
pitch perception
