The First CROS Hearing Aids?
In 1965, Harford and Barry were credited for the first accessible published description of across-head fitting1. It was called the CROS (Contralateral Routing of Offside Signals). Harford and Barry did acknowledge, however, that Wullstein and Wigand had published results on an almost identical across-head arrangement three years earlier2. The Wullstein and Wigand work has seldom…
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Hearing Testing History: Western Electric 2-A Audiometer
Western Electric 2-A Audiometer Most hearing care professionals have heard or read that one of the early audiometers for the measurement of hearing sensitivity was the Western Electric 2-A audiometer. Few have any idea what it looked like or what it did. This post is pleased to bring to readers some of the best detailed…
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