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American Journal of Audiology Vol.11 29-41 June 2002. doi:10.1044/1059-0889(2002/006)
© American Speech-Language-Hearing Association
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Low-Frequency Gain Compensation in Directional Hearing Aids

Todd Ricketts 1 and Paula Henry 1

1 Vanderbilt Bill Wilkerson Center, Nashville, TN

todd.a.ricketts{at}vanderbilt.edu

Hearing aids currently available on the market with both omnidirectional and directional microphone modes often have reduced amplification in the low frequencies when in directional microphone mode due to better phase matching. The effects of this low-frequency gain reduction for individuals with hearing loss in the low frequencies was of primary interest. Changes in sound quality for quiet listening environments following gain compensation in the low frequencies was of secondary interest. Thirty participants were fit with bilateral in-the-ear hearing aids, which were programmed in three ways while in directional microphone mode: no-gain compensation, adaptive-gain compensation, and full-gain compensation. All participants were tested with speech in noise tasks. Participants also made sound quality judgments based on monaural recordings made from the hearing aid. Results support a need for gain compensation for individuals with low-frequency hearing loss of greater than 40 dB HL.

Key Words: directional hearing aids, low-frequency compensation, directional benefit

Submitted on January 16, 2002
Accepted on June 5, 2002


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[Abstract] [Full Text] [PDF]


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