Title:
ACTIVE NOISE CONTROL SYSTEM, AND ANALOG ELECTRONIC CIRCUIT USED IN THE SAME
Document Type and Number:
Japanese Patent JP2014145905
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To achieve a high silence effect even out of a specific distance between a microphone and speaker, in an active noise control system for eliminating sound by generating a sound of an inverse phase to a noise.SOLUTION: In the active noise control system, a first microphone 2, a speaker 3, and a second microphone 4 are disposed sequentially in a duct, and the noise in the duct is removed using an analog ANC circuit 6. An analog electronic circuit 5 that converts the noise into an electric signal of 1 bit and delays the electric signal of 1 bit with a shift register is disposed in front of the analog ANC circuit 6.
Inventors:
KATO MASASHI
YAMANAKA SEIRA
YAMANAKA SEIRA
Application Number:
JP2013014367A
Publication Date:
August 14, 2014
Filing Date:
January 29, 2013
Export Citation:
Assignee:
NAGOYA INST TECHNOLOGY
International Classes:
G10K11/178; G10K11/16; H03H15/02; H03H21/00
Attorney, Agent or Firm:
Patent business corporation ゆうあい patent firm