abstract = {Studies have shown that listener preferences for omnidirectional (OMNI) or directional (DIR) processing in hearing aids depend largely on the characteristics of the listening environment, including the relative locations of the listener, signal sources, and noise sources; and whether reverberation is present. Many modern hearing aids incorporate algorithms to switch automatically between microphone modes based on an analysis of the acoustic environment. Little work has been done, however, to evaluate these devices with respect to user preferences, or to compare the outputs of different signal processing algorithms directly to make informed choices between the different microphone modes. This study describes a strategy for automatically switching between DIR and OMNI microphone modes based on a direct comparison between acoustic speech signals processed by DIR and OMNI algorithms in the same listening environment. In addition, data are shown regarding how a decision to choose one microphone mode over another might change as a function of speech to noise ratio (SNR) and spatial orientation of the listener.},
author = {Grant, Ken W. and Elhilali, Mounya and Shamma, Shihab A. and Walden, Brian E. and Surr, Rauna K. and Cord, Mary T. and Summers, Van},
doi = {10.1097/AUD.0b013e318164531f},
isbn = {0196-0202 (Print)$\backslash$r0196-0202 (Linking)},
issn = {0196-0202},
journal = {Ear and Hearing},
number = {2},
pages = {199--213},
title = {{An objective measure for selecting microphone modes in OMNI/DIR hearing aid circuits}},
url = {http://content.wkhealth.com/linkback/openurl?sid=WKPTLP:landingpage{\&}an=00003446-200804000-00006 https://insights.ovid.com/crossref?an=00003446-200804000-00006},
volume = {29},
year = {2008}