【摘要】 对14位正常听力者开展了环境声的人工耳蜗仿真声识别实验,比较了两类声码器仿真(正弦载波和噪声载波)条件下的环境声识别效果差异,然后对9位讲普通话的成年人工耳蜗植入者开展了环境声识别实验。实验材料是从互联网上搜集,并经过12位正常听力者主观测试验证后,筛选出的67种环境声。结果显示,载波类型没有对67种环境声的平均识别效果产生显著影响,但是声学特征的差异会导致单个环境声的识别效果对载波类型有依赖。另外,人工耳蜗植入者的环境声识别效果较差,有待通过信号处理策略、神经接口和康复手段的改进而得到提高。本研究中开发的环境声材料可以用于评估人工耳蜗环境声识别效果。更多还原

【Abstract】 The effects of the sinewave-band vocoder and noise-band vocoder on predicting the cochlear implant(CI)environment sound(ES) perception performance were compared through vocoder simulation experiments on 14 normal hearing(NH) listeners.Then,9 Mandarin-speaking CI users were also tested on ES perception.The sound materials were collected from the internet.Only the sounds,which were perfectly recognized by 12 NH listeners in a pre-test procedure,were used in the formal experiments.Results showed that:(1) the carrier type has no significant effects on the average recognition rates of the 67 vocoded ESs;(2) the carrier type may have some effects on the recognition of single vocoded ES depending on the acoustic characteristics of the original sound;(3) the 9 CI users showed poorer performance than NH.More works on signal processing strategy,neural interface,and rehabilitation methods should be done to close this gap.The materials in this study can be used in future CI-ES studies.更多还原