MICROPHONE ARRAY UNIT - 富士通株式会社

Title:

MICROPHONE ARRAY UNIT

Document Type and Number:

Japanese Patent JP3541339

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To detect a sound source position, to attain emphasis of an objective sound and to stably suppress noise or the like, with respect to the microphone array unit configured through the arrangement of plural microphones.
SOLUTION: This unit is provided with filters 2-1 to 2-n that receive output signals from plural microphones 1-1 to 1-n, an adder 3 that subtracts output signals from the microphones 1-2 to 1-n via the filters 2-2 to 2-n from an output signal of the reference microphone 1-1 via the filter 2-1, and a filter coefficient calculation section 4 that updates filter coefficients of the filters 2-1 to 2-n, based on the output signals from plural microphones 1-1 to 1-n, an output signal from the adder 3 and a signal (input signal) for driving a loudspeaker 6 that is used for a noise source 6, when a speaking party 5 is used for an object sound source.

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Inventors:

Naoji Matsuo

Application Number:

JP17028897A

Publication Date:

July 07, 2004

Filing Date:

June 26, 1997

Export Citation:

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Assignee:

富士通株式会社

International Classes:

H04R5/027; G01S3/802; H03H17/00; H04R1/40; H04R3/00; (IPC1-7): H04R3/00; G01S3/802; H03H17/00; H04R1/40; H04R5/027

Domestic Patent References:

JP1320846A
JP2158253A
JP4178100A
JP792980A
JP5122689A
JP1051889A

Attorney, Agent or Firm:

Shoji Kashiwaya
Koichi Watanabe
Manabe Kiyoshi

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