Clark G M, Tong Y C, Patrick J F, Seligman P M, Crosby P A, Kuzma J A, Money D K
J Med Eng Technol. 1984 Jan-Feb;8(1):3-8. doi: 10.3109/03091908409032065.
A multi-channel cochlear implant hearing prosthesis providing 22 separate channels of stimulation has been developed. The electronics for the implantable receiver-stimulator have been incorporated on a single chip, using digital circuits and employing CMOS technology. The chip is enclosed in a titanium capsule with platinum/ceramic electrode feed-throughs. A pocket-sized speech processor and directional microphone extract the following speech parameters: signal amplitude, fundamental frequency and formant frequency. The fundamental frequency is coded as electric pulse rate, and formant frequency by electrode position. The speech processor has been realized using hybrid circuits and CMOS gate arrays. The multi-channel prosthesis has undergone a clinical trial on four postlingually deaf patients with profound-total hearing losses. The speech perception results indicate that they were able to obtain open-set speech recognition scores for phonetically balanced words, CID sentences and spondees. In all cases the tests showed significant improvements when using the cochlear prosthesis combined with lipreading compared to lipreading alone.
一种提供22个独立刺激通道的多通道人工耳蜗听力假体已被研发出来。用于植入式接收器-刺激器的电子设备已集成在一个芯片上，采用数字电路并运用CMOS技术。该芯片封装在一个带有铂/陶瓷电极馈通的钛胶囊中。一个袖珍型语音处理器和定向麦克风提取以下语音参数：信号幅度、基频和共振峰频率。基频被编码为电脉冲速率，共振峰频率则通过电极位置编码。语音处理器已采用混合电路和CMOS门阵列实现。该多通道假体已在四名语后聋且听力完全重度丧失的患者身上进行了临床试验。言语感知结果表明，他们能够获得针对语音平衡词、CID句子和扬扬格词的开放集言语识别分数。在所有情况下，测试均显示，与单独唇读相比，使用人工耳蜗并结合唇读时，有显著改善。
