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1. WO2020180961 - ACTIVE NOISE REDUCTION (ANR) SYSTEM WITH MULTIPLE FEEDFORWARD MICROPHONES AND MULTIPLE CONTROLLERS

Publication Number WO/2020/180961
Publication Date 10.09.2020
International Application No. PCT/US2020/020950
International Filing Date 04.03.2020
IPC
G10K 11/178 2006.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11Methods 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
16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
175using interference effects; Masking sound
178by electro-acoustically regenerating the original acoustic waves in anti-phase
CPC
G10K 11/17823
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES
11Methods 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
16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
175using interference effects; Masking sound
178by electro-acoustically regenerating the original acoustic waves in anti-phase
1781characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
17821characterised by the analysis of the input signals only
17823Reference signals, e.g. ambient acoustic environment
G10K 11/17853
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES
11Methods 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
16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
175using interference effects; Masking sound
178by electro-acoustically regenerating the original acoustic waves in anti-phase
1785Methods, e.g. algorithms; Devices
17853of the filter, e.g. leakage tuning
G10K 11/17857
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES
11Methods 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
16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
175using interference effects; Masking sound
178by electro-acoustically regenerating the original acoustic waves in anti-phase
1785Methods, e.g. algorithms; Devices
17857Geometric disposition, e.g. placement of microphones
G10K 11/17873
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES
11Methods 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
16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
175using interference effects; Masking sound
178by electro-acoustically regenerating the original acoustic waves in anti-phase
1787General system configurations
17873using a reference signal without an error signal, e.g. pure feedforward
G10K 11/17881
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES
11Methods 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
16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
175using interference effects; Masking sound
178by electro-acoustically regenerating the original acoustic waves in anti-phase
1787General system configurations
17879using both a reference signal and an error signal
17881the reference signal being an acoustic signal, e.g. recorded with a microphone
G10K 11/17885
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES
11Methods 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
16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
175using interference effects; Masking sound
178by electro-acoustically regenerating the original acoustic waves in anti-phase
1787General system configurations
17885additionally using a desired external signal, e.g. pass-through audio such as music or speech
Applicants
  • BOSE CORPORATION [US]/[US]
Inventors
  • NIELSEN, Ole Mattis
Agents
  • SARKAR, Indranil
  • BARCLAY, Jeffrey J.
Priority Data
16/292,90805.03.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ACTIVE NOISE REDUCTION (ANR) SYSTEM WITH MULTIPLE FEEDFORWARD MICROPHONES AND MULTIPLE CONTROLLERS
(FR) SYSTÈME DE RÉDUCTION ACTIVE DU BRUIT (ANR) AVEC DE MULTIPLES MICROPHONES À ANTICIPATION ET DE MULTIPLES CONTRÔLEURS
Abstract
(EN)
Technology described in this document can be embodied in a method that includes receiving a first input signal captured by at least a first feedforward microphone associated with an active noise reduction (ANR) device, receiving a second input signal captured by at least a second feedforward microphone associated with the ANR device, processing the first input signal using a first filter disposed in a first ANR signal flow path to generate a first output signal for an acoustic transducer of the ANR device, processing the second input signal using a second filter disposed in a second ANR signal flow path to generate a second output signal for the acoustic transducer, in which the second filter is different from the first filter, and generating a combined signal for the acoustic transducer based on combining the first output signal with the second output signal.
(FR)
La technologie décrite dans le présent document peut être mise en œuvre dans un procédé qui comprend la réception d'un premier signal d'entrée capturé par au moins un premier microphone à anticipation associé à un dispositif à réduction active du bruit (ANR), la réception d'un second signal d'entrée capturé par au moins un second microphone à anticipation associé au dispositif ANR, le traitement du premier signal d'entrée à l'aide d'un premier filtre disposé dans un premier trajet d'écoulement de signal ANR pour générer un premier signal de sortie pour un transducteur acoustique du dispositif ANR, le traitement du second signal d'entrée à l'aide d'un second filtre disposé dans un second trajet d'écoulement de signal ANR pour générer un second signal de sortie pour le transducteur acoustique, dans lequel le second filtre est différent du premier filtre, et la génération d'un signal combiné pour le transducteur acoustique sur la base de la combinaison du premier signal de sortie avec le second signal de sortie.
Also published as
Latest bibliographic data on file with the International Bureau