Externalization of remote microphone signals using a structural binaural model of the head and pinna.
Externalization of remote microphone signals using a structural binaural model of the head and pinna.
复制标题
使用头部和耳廓的结构双耳模型来外化远程麦克风信号。
DOI：
10.1121/1.5032326
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Kristin K. Sommerfeldt
中科院分区：
文献类型：
--
作者：
J. Kates;K. Arehart;R. Muralimanohar;Kristin K. Sommerfeldt
在远程麦克风（RM）系统中，讲话者对着麦克风讲话，并且信号被传输到听力受损的收听者所佩戴的助听器。然而，远程麦克风的一个困难是，助听器接收到的信号绕过了头部和耳廓，因此缺少了将声源外部化所需的声学线索。本文的目的是处理RM信号，以改善外化时，通过耳机收听。该处理基于结构双耳模型，其使用级联的处理模块来模拟耳间水平差、耳间时间差、耳廓反射、耳道共振和早期房间反射。结构双耳模型的外部化结果与左右信号混合、收听者自己的无回声头部相关脉冲响应（HRIR）和收听者自己的具有房间混响的HRIR进行比较。方位角从正前方变化到一侧90°。结果表明，结构双耳模型是有效的，因为听众自己的HRIR加上混响在生产一个外部化的声像，并有没有显着差异，听力受损和正常听力的听众之间的外部化。
In a remote microphone (RM) system, a talker speaks into a microphone and the signal is transmitted to the hearing aids worn by the hearing-impaired listener. A difficulty with remote microphones, however, is that the signal received at the hearing aid bypasses the head and pinna, so the acoustic cues needed to externalize the sound source are missing. The objective of this paper is to process the RM signal to improve externalization when listening through earphones. The processing is based on a structural binaural model, which uses a cascade of processing modules to simulate the interaural level difference, interaural time difference, pinna reflections, ear-canal resonance, and early room reflections. The externalization results for the structural binaural model are compared to a left-right signal blend, the listener's own anechoic head-related impulse response (HRIR), and the listener's own HRIR with room reverberation. The azimuth is varied from straight ahead to 90° to one side. The results show that the structural binaural model is as effective as the listener's own HRIR plus reverberation in producing an externalized acoustic image, and that there is no significant difference in externalization between hearing-impaired and normal-hearing listeners.