Audio device

Details Audio device Audio device

2005-03-01

2005-03-01

Isen, Forester W. (Department: 2644)

Electrical audio signal processing systems and devices

Binaural and stereophonic

C381S302000, C381S017000

Reexamination Certificate

active

06862356

ABSTRACT:
A dummy listener and right and left speakers13and14are disposed in an anechoic room as a model of the layout of those a car cabin15or the like. Transfer functions ALL, ALR, ARL and ARR in a space ranging from the speakers13and14to the right and left ears of a listener16in a car cabin15or the like are calculated from impulse response series aLL(t) to aRR(t) obtained when pulse sounds are respectively emitted from the speakers13and14. A correction circuit10bcontains correction transfer functions H11, H12, H21and H22, which are obtained by an inverse matrix of a 2-row and 2-column regular matrix of which the elements are the transfer functions ALL, ALR, ARL and ARR. Audio signals SL and SR on which head related transfer functions are superimposed are applied to the correction circuit10b, and the output signals of the correction circuit10bare supplied to the speakers13and14.

REFERENCES:
patent: 5187692 (1993-02-01), Haneda et al.
patent: 5467401 (1995-11-01), Nagamitsu et al.
patent: 5604809 (1997-02-01), Tsubonuma et al.
patent: 5727066 (1998-03-01), Elliott et al.
patent: 5862227 (1999-01-01), Orduna-Bustamante et al.
patent: 6222930 (2001-04-01), Nakano et al.
patent: 6243476 (2001-06-01), Gardner

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