Method of improving the audibility of sound from a...

Details Method of improving the audibility of sound from a... Method of improving the audibility of sound from a...

2007-02-13

2007-02-13

Mei, Xu (Department: 2615)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

C381S072000, C381S074000

Reexamination Certificate

active

10220722

ABSTRACT:
A method and apparatus for improving the audibility of sound from a loudspeaker located close to an ear, comprises the steps of detecting ambient acoustic noise arriving from other sound sources using a transducer that provides corresponding ambient sound signals, inverting the polarity of said ambient sound signals and combining them with the signals being fed to the loudspeaker to reduce the audibility of said ambient acoustic noise, and passing said ambient sound signals through a filter having a predetermined average transfer function that compensates for the spectral modification of sounds travelling from the loudspeaker to the ear caused by the proximity of the ear of a listener in use.

REFERENCES:
patent: 5251263 (1993-10-01), Andrea et al.
patent: 5416846 (1995-05-01), Tamura et al.
patent: 5481615 (1996-01-01), Eatwell et al.
patent: 5689572 (1997-11-01), Ohki et al.
patent: 5751815 (1998-05-01), Philp et al.
patent: 5852667 (1998-12-01), Pan et al.
patent: 6118878 (2000-09-01), Jones
patent: 6278786 (2001-08-01), McIntosh
patent: 0 192 379 (1986-08-01), None
Carme, C.,Absorption Acoustic Active Dans le Cavites Auditives, Acustica, Oct. 1998, p. 233-246, vol. 66, No. 5, FRANCE.

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