Title:
NOISE CONTROLLER
Document Type and Number:
Japanese Patent JP2501717
Kind Code:
B2
Abstract:
PURPOSE: To improve an adaptive characteristic by accelerating the response speed in an adaptive filtering means outputting a signal having a phase opposite to and sound pressure equal to a noise from a speaker and eliminating the noise.
CONSTITUTION: A noise controller provided with an adaptive filter is provided with a transmission characteristic imitation means 153 imitating a transmission characteristic until returning as the error data, a constant storage means 1526 for updating a coefficient storing a constant for updating a filter coefficient, second plural multiplying means 1522 multiplying the constant by the error data, second plural delaying means 1521 successively delaying the transmission characteristic imitation input data, third plural multiplying means 1523 multiplying the delay output data by the second multiplied output data and plural updating means 1524, 1525 adding the output data of the multiplying means 1523 to the last filter coefficient data and updating the filter coefficient.
Inventors:
NAGAMI MASAAKI
SAKO KAZUYA
BABASAKI MASAHIRO
SAKYAMA KAZUHIRO
SAKO KAZUYA
BABASAKI MASAHIRO
SAKYAMA KAZUHIRO
Application Number:
JP13373492A
Publication Date:
May 29, 1996
Filing Date:
May 26, 1992
Export Citation:
Assignee:
FUJITSU TEN LTD
International Classes:
F01N1/06; F01N1/00; G10K11/16; G10K11/178; H03H21/00; H04B3/04; (IPC1-7): G10K11/178; F01N1/00; H03H21/00
Domestic Patent References:
| JP588685A | ||||
| JP535282A |
Attorney, Agent or Firm:
Aoki Akira (4 outside)