Abstract
This book is a compilation of papers presented at a conference organized by the editors in June 1978. Twentyseven persons participated in the preparation of 17 chapters designed bring to a wider audience a progress report on the 'state of the art' in the acoustic areas of hearing aid performance. The first of four sections reviews physical factors governing sound reverberation and speech perception by normal and hearing-impaired listeners in closed space. This is followed with reports of data showing variations in acoustic pressures recorded from manikin-worn aids as a function of (1) signal azimuths, (2) directional characteristics and location of receiving microphones, and (3) acoustic characteristics of the test environment. The second section focuses on the acoustic shaping characteristics of the normal and simulated external ear and on earmolds and microphones. The historic development and physical description of the Zwislocki coupler is outlined, followed by a report on
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