Proposed 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.
Frequency-Shift Hearing Aid
NASA Tech Briefs ; 18 , 12
1994-12-01
Miscellaneous
No indication
English
Online Contents | 1994
Higher-frequency wavenumber shift and frequency shift in a cracked, vibrating beam
Online Contents | 2008
|TIBKAT | 2017
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