SOUND EXTRACTION METHOD AND APPARATUS

Japanese Patent JPH0587619

A

PURPOSE:To improve an S/N ratio concerning sound extraction method and apparatus which allow the extraction of a desired sound alone from among a plurality of sounds generated simultaneously from a plurality of sound sources. CONSTITUTION:Sounds are generated from sound sources other than those as desired among a plurality of sound sources while the sounds at the rest of the desired sound sources are recorded separately with a plurality of sensors arranged at different positions to obtain a plurality of synthetic sound signals and cross spectrums and power spectrums of the signals are determined. The inverse matrix of the matrix of a transfer function is determined having the spectrums and a function showing a time delay in the transmission of sounds between the desired sound sources and the plurality of sensors as elements. The synthetic sound signals obtained by recording the sounds from the plurality of sound sources including the desired sound source with the plurality of sensors separately undergoes a filtering processing having the respective elements corresponding to the desired sound source as well as to a plurality of microphones in the inverse matrix as transfer functions to add up the synthetic sound signals.

JP2005025109	SOUND ELIMINATOR
JP3324876	[Title of Invention] Probe Microphone

FUJII KIYOTO
ABE MASATO
SONE TOSHIO
KIDO KENICHI

JP24752691A

April 06, 1993

September 26, 1991

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ONO SOKKI CO LTD
FUJII KIYOTO
ABE MASATO
SONE TOSHIO
KIDO KENICHI

G01H3/00; G01H3/08; G01H17/00; G10L15/20; G10L19/00; G10L21/0208; G10L21/0272; G10L21/028; H04R3/00; (IPC1-7): G01H3/00; G01H3/08; G10L3/02; G10L9/00; H04R3/00

Masaki Yamada (1 person outside)

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