![]() In the late 1980s, a group of physicians in Redwood City, CA developed a hearing aid based on Vilchur’s work and began selling it as ReSound. In 1973, famed American inventor Edgar Vilchur conceived of a multi-channel compression amplifier for hearing aids, which he published to the public domain. I began fitting first-generation ReSound hearing aids in the early 1990s, and I still remember the look on my patients’ faces when they heard me talking from down the hall for the first time in decades.įor some context, ReSound is an interesting story of innovation and growth.
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