Reinhart Paul, Zahorik Pavel, Souza Pamela E
Northwestern University, Evanston, Illinois 60208, USA
University of Louisville, Louisville, Kentucky 40292, USA
J Acoust Soc Am. 2017 Jul;142(1):EL130. doi: 10.1121/1.4994683.
Wide dynamic range compression (WDRC) processing in hearing aids alters the signal-to-noise ratio (SNR) of a speech-in-noise signal. This effect depends on the modulations of the speech and noise, input SNR, and WDRC speed. The purpose of the present experiment was to examine the change in output SNR caused by the interaction between modulation characteristics and WDRC speed. Two modulation manipulations were examined: (1) reverberation and (2) variation in background talker number. Results indicated that fast-acting WDRC altered SNR more than slow-acting WDRC; however, reverberation reduced this difference. Additionally, less modulated maskers led to poorer output SNRs than modulated maskers.
助听器中的宽动态范围压缩(WDRC)处理会改变噪声中语音信号的信噪比(SNR)。这种效应取决于语音和噪声的调制、输入信噪比以及WDRC速度。本实验的目的是研究调制特性与WDRC速度之间的相互作用所导致的输出信噪比变化。研究了两种调制操作:(1)混响和(2)背景谈话者数量的变化。结果表明,快速作用的WDRC比慢速作用的WDRC对信噪比的改变更大;然而,混响减小了这种差异。此外,与经过调制的掩蔽声相比,调制较少的掩蔽声会导致较差的输出信噪比。