Integrating a remote microphone with hearing-aid processing.
Integrating a remote microphone with hearing-aid processing.
复制标题
将远程麦克风与助听器处理集成。
DOI：
10.1121/1.5111339
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
L. O. Harvey
中科院分区：
文献类型：
--
作者：
J. Kates;K. Arehart;L. O. Harvey
远程麦克风 (RM) 将讲话者的麦克风与听者的助听器 (HA) 连接起来。 RM 提高了噪声和混响的清晰度，但外化所需的双耳提示丢失了。使用合成双耳提示和早期反射增强 RM 信号可以增强外化，但 RM 信号与 HA 处理的相互作用可能会降低其有效性。在真实的聆听模拟中使用 RM 加 HA 处理来评估这些潜在的相互作用。 HA 输入是单独的 RM、增强的 RM 信号、HA 麦克风的声学输入（包括使用仿真头测量的混响）或增强的 RM 和声学输入信号的混合。 HA 模拟在两只耳朵上实现了线性放大或独立的动态范围压缩，并结合了通风耳模的声学效果。听力受损的听众对句子刺激的可懂度和清晰度、整体质量、外化和表观源宽度进行评分。使用 RM 提高了清晰度，但降低了空间印象。增加通风口直径会降低清晰度并增加空间印象。听众评级反映了清晰度和整体质量属性与外化和源宽度属性之间的权衡，可以使用耳间互相关来解释。
A remote microphone (RM) links a talker's microphone to a listener's hearing aids (HAs). The RM improves intelligibility in noise and reverberation, but the binaural cues necessary for externalization are lost. Augmenting the RM signal with synthesized binaural cues and early reflections enhances externalization, but interactions of the RM signal with the HA processing could reduce its effectiveness. These potential interactions were evaluated using RM plus HA processing in a realistic listening simulation. The HA input was the RM alone, the augmented RM signal, the acoustic inputs at the HA microphones, including reverberation measured using a dummy head, or a mixture of the augmented RM and acoustic input signals. The HA simulation implemented linear amplification or independent dynamic-range compression at the two ears and incorporated the acoustic effects of vented earmolds. Hearing-impaired listeners scored sentence stimuli for intelligibility and rated clarity, overall quality, externalization, and apparent source width. Using the RM improved intelligibility but reduced the spatial impression. Increasing the vent diameter reduced clarity and increased the spatial impression. Listener ratings reflect a trade-off between the attributes of clarity and overall quality and the attributes of externalization and source width that can be explained using the interaural cross correlation.