Previous studies have suggested a strong effect of reverberation on speech intelligibility (SI) in cochlear implant (CI) recipients. In many of them, different reverberation conditions were obtained by altering the acoustic absorption of a single room, thereby omitting the effect of the room volume. In addition, studies that have investigated the combined effects of reverberation and noise on SI have overlooked the effect of reverberation on the modulation of the noise. In the present study, SI was measured unilaterally in 12 CI recipients in quiet and in noise using a three-dimensional loudspeaker array. Target speech was convolved with room impulse responses (RIRs) recorded at three talker-to-listener distances in five physical rooms with distinct reverberation times. Noise consisted of four two-talker dialogues convolved with RIRs measured at fixed positions around the listener. Results in quiet suggest that a significant drop in SI occurs mainly at long talker-to-listener distances, and small reverberant rooms affect SI the most. In noise, the most detrimental type of noise is anechoic as it is the most modulated. Overall, the results suggest that at fixed signal-to-noise ratios the effects of noise and reverberation are smallest at short distances in large rooms or in small rooms with some reverberation.

中文翻译：

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噪声和混响对现实声音环境中人工耳蜗接受者语音清晰度的影响。

以前的研究表明，混响对人工耳蜗 (CI) 接受者的语音清晰度 (SI) 有很强的影响。在其中许多中，通过改变单个房间的吸声来获得不同的混响条件，从而忽略房间体积的影响。此外，研究混响和噪声对 SI 的综合影响的研究忽略了混响对噪声调制的影响。在本研究中，使用三维扬声器阵列在安静和噪声中单方面测量 12 名 CI 接受者的 SI。目标语音与在五个具有不同混响时间的物理房间中以三个说话者到听众的距离记录的房间脉冲响应 (RIR) 进行卷积。噪声由四个两个说话者的对话组成，这些对话与在听者周围固定位置测量的 RIR 卷积。安静的结果表明 SI 的显着下降主要发生在说话者到听众的距离较远的地方，而小的混响房间对 SI 的影响最大。在噪声中，最有害的噪声类型是消声，因为它是调制最多的。总体而言，结果表明，在固定的信噪比下，噪声和混响的影响在短距离的大房间或有一些混响的小房间中最小。