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Accessories

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How Do Medical Masks Degrade Speech Reception?

This study shows that each type of medical mask essentially functions as a low-pass acoustic filter for speech, attenuating the high frequencies (2000-7000 Hz) spoken by the wearer by 3 to 4 dB for a simple medical mask and close to 12 dB for the N95 masks. In the era of Covid-19, Alexander Goldin, Barbara Weinstein, and Nimrod Shiman also explain how some of these problems might be overcome.

Accessories, Accessories, Hearing Products

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Study Shows Hair Cell Regrowth with New Drug

A new approach, published in “Cell Reports,” to regenerate inner ear sensory hair cells is said to lay the groundwork for treating chronic noise-induced hearing loss by the company, Frequency Therapeutics, and its co-founders who are drawing on research from Brigham and Women's Hospital (BWH), Harvard Medical School, Mass Eye and Ear Infirmary, and MIT. The program is expected to progress to into human clinical trials within the next 18 months.

Earmolds

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Modification of Musicians’ Earplugs

Marshall Chasin explains how earplugs are modified for long-eared or short-eared individuals who have ear canal resonances that are less, or more, than the usual 2700 Hz.