Abstract
The purpose of this paper is to describe the development of electroacoustic test procedures for evaluation of hearing aids by the Veterans Administration (VA). These methods have evolved from the use of the 2‐cm3 coupler with pure tones as the input stimuli to the use of the KEMAR manikin with various types of complex noise as input stimuli. Hugh Knowles served as a consultant to the VA and his efforts, both for the VA and the research and development community at large, formed the framework for the evaluation program in place today. His contribution and leadership have resulted in procedures that permit the evaluation of a hearing aid in a manner very similar to the way it will be used by the wearer. Current use of FFT analysis and strategies for evaluating noise reduction circuits and in‐the‐ear hearing aids will be highlighted.
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