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American Journal of Audiology Vol.8 117-127 December 1999. doi:10.1044/1059-0889(1999/018)
© American Speech-Language-Hearing Association
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Making Sense of Directional Microphone Hearing Aids

Todd Ricketts 1 and H. Gustav Mueller 1

1 Dan Maddox Hearing Aid Research Laboratory, Vanderbilt Bill Wilkerson Center for Otolaryngology and Communication Science, Vanderbilt University, Nashville, Tennessee

todd.a.ricketts{at}vanderbilt.edu

We have witnessed a large increase in the availability of directional microphone hearing aids over the past few years. Directional microphone technology is now available in analog, digitally controlled analog, and digital hearing aids, and has been implemented into both behind-the-ear and in-the-ear styles. This Short Course reviews basic design differences across directional microphone hearing aids. A number of different laboratory and clinical evaluation methods used for assessment of both electroacoustic and behavioral directivity are then reviewed. In addition, the potential impact of test conditions such as room reverberation and type and position of competing noise(s), on listener performance when fit with directional hearing aids are considered. Recommendations and suggestions relating to the clinical and laboratory assessment of directional hearing aids are provided.

Key Words: hearing aids, directivity, directional benefit, directional performance

Submitted on June 10, 1998
Accepted on July 19, 1999




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