Method and apparatus for filtering and compressing sound...

Details Method and apparatus for filtering and compressing sound... Method and apparatus for filtering and compressing sound...

2005-03-29

2005-03-29

Kuntz, Curtis (Department: 2643)

Electrical audio signal processing systems and devices

Including amplitude or volume control

With amplitude compression/expansion

C381S107000, C381S320000

Reexamination Certificate

active

06873709

ABSTRACT:
Improved approaches are disclosed to filter and compress sound signals so as to achieve not only speech audibility and intelligibility at low levels but also preserves spectrum contrast at high levels. According to one aspect of the invention, gain amounts for different frequency bands are individually constrained based on signal levels for the frequency bands. Hence, the gain amounts for each of the frequency bands may or may not be constrained depending on the corresponding signal levels. As a result, the most critical information for speech intelligibility, speech clarity, and speech quality can be made available to hearing impaired people over wide range of signal level. The invention is particularly useful for hearing aids or other sound systems for the hearing impaired.

REFERENCES:
patent: 4882762 (1989-11-01), Waldhauer
patent: 5500902 (1996-03-01), Stockham, Jr. et al.
patent: 5550902 (1996-08-01), Abbruscato
patent: 5724433 (1998-03-01), Engebretson et al.
patent: 5832097 (1998-11-01), Armstrong et al.
patent: 5832444 (1998-11-01), Schmidt
patent: 5848171 (1998-12-01), Stockham et al.
patent: WO 9423548 (1994-10-01), None
patent: WO 9856210 (1998-12-01), None
E. Villcher, “Signal Processing to Improve Speech Intelligibility in Perceptive Deafness,” The Journal of the Acoustical Society of America, vol. 53, No. 6, pp. 1646-1657, 1973.

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