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Frequency-Shift Hearing AidProposed hearing aid maps spectrum of speech into band of lower frequencies at which ear remains sensitive. By redirecting normal speech frequencies into frequency band from 100 to 1,500 Hz, hearing aid allows people to understand normal conversation, including telephone calls. Principle operation of hearing aid adapted to other uses such as, clearing up noisy telephone or radio communication. In addition, loud-speakers more easily understood in presence of high background noise.
Document ID
19940000671
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Weinstein, Leonard M.
(NASA Langley Research Center, Hampton, VA.)
Date Acquired
August 16, 2013
Publication Date
December 1, 1994
Publication Information
Publication: NASA Tech Briefs
Volume: 18
Issue: 12
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
LAR-15056
Accession Number
94B10671
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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