Title:
【発明の名称】アクティブ騒音制御システムの伝達特性の推定方法
Document Type and Number:
Japanese Patent JP3340496
Kind Code:
B2
Abstract:
The method comprises the steps of: generating white noise at an end of a one-dimensional sound field (2) that is defined by a linear ventilating system in which sound travels essentially parallel to the extended direction of the system; equalizing the transfer charasteristic of the one-dimensional sound field and generating cancelling sound, according to an inverse of the transfer characteristic (at 8), to cancel the white noise and prevent noise being output from the other end of the one-dimensional sound field; continuously preventing the noise output and measuring the characteristic data of the one-dimensional sound field at, at least, one measuring point in the one-dimensional sound field; and calculating the transfer function of the one-dimensional sound field in the noise-output-prevented state, according to the characteristic data of the sound field.
Inventors:
Tadashi Ohashi
Kensaku Fujii
Juro Ohga
Kensaku Fujii
Juro Ohga
Application Number:
JP4709593A
Publication Date:
November 05, 2002
Filing Date:
March 09, 1993
Export Citation:
Assignee:
富士通株式会社
International Classes:
F01N1/00; F01N1/06; G10K11/16; G10K11/178; H03H17/00; H03H17/02; H03H21/00; H04B3/04; (IPC1-7): G10K11/178; F01N1/00; F01N1/06; G10K11/16; H03H17/02; H03H21/00
Attorney, Agent or Firm:
Shunichiro Nagasawa