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1. (US20190019493) Active noise control apparatus

Office : United States of America
Application Number: 16065008 Application Date: 09.02.2016
Publication Number: 20190019493 Publication Date: 17.01.2019
Grant Number: 10199033 Grant Date: 05.02.2019
Publication Kind : B1
Prior PCT appl.: Application Number:PCTJP2016053820 ; Publication Number: Click to see the data
IPC:
G10K 11/16
H04R 3/00
G10K 11/178
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
K
SOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11
Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
16
Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3
Circuits for transducers
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
K
SOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11
Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
16
Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
175
using interference effects; Masking sound
178
by electro-acoustically regenerating the original acoustic waves in anti-phase
CPC:
G10K 11/1781
G10K 11/17854
G10K 11/17881
G10K 2210/3028
G10K 2210/3054
Applicants: Mitsubishi Electric Corporation
Inventors: Atsuyoshi Yano
Agents: Birch, Stewart, Kolasch & Birch, LLP
Priority Data:
Title: (EN) Active noise control apparatus
Abstract: front page image
(EN)

An active noise control apparatus (100) includes: a sound source signal generating unit (1) generating a sound source signal from a control frequency determined in accordance with a noise source (400); a control signal filter (2) generating an original control signal by filtering the sound source signal; a stabilization processing unit (5) generating a control signal by filtering the original control signal to allow a signal in a frequency band including the control frequency to pass through, and to block a signal in a frequency band including disturbance added to the noise; a reference signal filter (3) generating a reference signal by filtering the sound source signal. The apparatus further includes: a filter coefficient updating unit (4) updating a filter coefficient sequence of the control signal filter using an error signal being an interference between a secondary noise generated from the control signal and the noise, and the reference signal.


Also published as:
DE112016006169WO/2017/138094