PMID: 16515138Mar 7, 2006Paper

Effect of signal-to-noise ratio on directional microphone benefit and preference

Journal of the American Academy of Audiology
Brian E WaldenOle Dyrlund

Abstract

This study examined speech intelligibility and preferences for omnidirectional and directional microphone hearing aid processing across a range of signal-to-noise ratios (SNRs). A primary motivation for the study was to determine whether SNR might be used to represent distance between talker and listener in automatic directionality algorithms based on scene analysis. Participants were current hearing aid users who either had experience with omnidirectional microphone hearing aids only or with manually switchable omnidirectional/directional hearing aids. Using IEEE/Harvard sentences from a front loudspeaker and speech-shaped noise from three loudspeakers located behind and to the sides of the listener, the directional advantage (DA) was obtained at 11 SNRs ranging from -15 dB to +15 dB in 3 dB steps. Preferences for the two microphone modes at each of the 11 SNRs were also obtained using concatenated IEEE sentences presented in the speech-shaped noise. Results revealed that a DA was observed across a broad range of SNRs, although directional processing provided the greatest benefit within a narrower range of SNRs. Mean data suggested that microphone preferences were determined largely by the DA, such that the greater the benefit...Continue Reading

Citations

Oct 30, 2009·Ear and Hearing·Yu-Hsiang Wu, Ruth A Bentler
Sep 24, 2009·Ear and Hearing·Yu-Hsiang Wu, Ruth A Bentler
Jun 20, 2013·International Journal of Audiology·Yu-Hsiang WuRuth A Bentler
Sep 4, 2015·Clinical and Experimental Otorhinolaryngology·Hee-Sung ParkSung Hwa Hong
Nov 3, 2020·Ear and Hearing·Varsha RallapalliPamela Souza

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