Some Implications of Body Baffle for Hearing Aid Selection

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Abstract
A series of measurements was performed to assess the effects of body baffle and shadow on the output of body worn hearing aids. These confirmed the results of previous research by demonstrating that the output of a hearing aid when worn on a person's chest differs from the output measured in the usual manner, namely with the hearing aid suspended in space. It was also found that the response of a hearing aid worn on the body varies according to the direction of the sound stimulus and that relatively small changes in direction may result in appreciable changes in aid response. Some implications of body baffle and shadow are discussed in relation to the selection and fitting of hearing aids.

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