Old Hearing Aids – What is Your Story?

While searching the garage the other day for a baling hook, I found a box titled “old hearing aids.” I wondered how old some of these might be, and if there were any interesting features/design characteristics. And, why did I keep these? A number of photos of old hearing aids can be found in the…

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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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