Apparatus for rectifying resonance in the outer-ear canals...

Details Apparatus for rectifying resonance in the outer-ear canals... Apparatus for rectifying resonance in the outer-ear canals...

2009-02-06

2011-12-20

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

C381S074000

Reexamination Certificate

active

08081769

ABSTRACT:
According to one embodiment, an apparatus for cancelling resonance in an outer-ear canal, comprises an outer-ear canal model includes attenuator modules representing reflection coefficients of an earphone or headphone and an eardrum, and a delay module having a delay time corresponding to a distance between the earphone or headphone and the eardrum, an inverse-filter forming unit configured to form an inverse filter of the outer-ear canal model, and a convolution module configured to perform convolution on an impulse response from the inverse filter and a sound-source signal.

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Notice of Reasons for Rejection issued in Japanese Patent Application No. 2008-035268, mailed May 19, 2009 (6 pages).

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