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October 1975

Interpreting Hearing Aid Technology

Arch Otolaryngol. 1975;101(10):640-641. doi:10.1001/archotol.1975.00780390054016

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Interpreting Hearing Aid Technology is a collection of chapters written by various professionals from the fields of audiology, education, engineering, speech science, and hearing aid manufacturing.

The first chapter offers a brief history of the development of the hearing aid from early ear trumpets to present day transistorized instruments. It includes a discussion of the basic mechanisms involved in hearing aids and would be informative for those just beginning to investigate hearing aids. The chapter also has an introduction to various group amplifiers presently used in educational settings.

Chapters two and three are more involved and would probably be too intricate for the individual merely interested in an overview of amplification. Chapter two investigates, among other things, the mechanics of measuring hearing aid response characteristics and has excellent illustrations. The procedure and rational for developing various electroacoustic measurements are discussed. An explanation of the common specifications applying to gain, maximum

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