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1. WO2020142690 - HIGH-FREQUENCY BROADBAND AIRBORNE NOISE ACTIVE NOISE CANCELLATION

Publication Number WO/2020/142690
Publication Date 09.07.2020
International Application No. PCT/US2020/012185
International Filing Date 03.01.2020
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 11/178
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
G10K 2210/3226
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES
2210Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
30Means
321Physical
3226Sensor details, e.g. for producing a reference or error signal
Applicants
  • HARMAN INTERNATIONAL INDUSTRIES, INCORPORATED [US]/[US]
Inventors
  • KIM, Geon-Seok
Agents
  • SLUTSKY, Isaac T.
  • KUSHMAN, James A.
  • NEMAZI, John E.
  • BRODBINE, Michael S.
Priority Data
62/788,41304.01.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) HIGH-FREQUENCY BROADBAND AIRBORNE NOISE ACTIVE NOISE CANCELLATION
(FR) ANNULATION ACTIVE DE BRUIT AÉRIEN À LARGE BANDE HAUTE FRÉQUENCE
Abstract
(EN)
Noise signals are captured from one or more physical error microphones located at first locations within the vehicle. High-frequency noise signals are captured from a feedforward system sensor. A virtual microphone algorithm is utilized to estimate noise signals at a virtual location based on the noise signals, the estimation utilizing a transfer function that estimates a signal that would have been received by the one or more physical error microphones at the virtual location. The virtual microphone algorithm is utilized to estimate noise signals at the virtual location based on the high-frequency noise signal. A noise-cancelling signal is provided to cancel noise at the virtual location, the noise-cancelling signal accounting for the noise captured by both the feedforward system sensor and the one or more physical error microphones, the ANC system utilizing a working frequency for the ANC of at least 2 kHz.
(FR)
Selon la présente invention, des signaux de bruit sont capturés par un ou plusieurs microphones d’erreur physiques situés à des premiers emplacements à l'intérieur du véhicule. Des signaux de bruit haute fréquence sont capturés par un capteur à système de correction aval. Un algorithme de microphone virtuel est utilisé pour estimer des signaux de bruit à un emplacement virtuel sur la base des signaux de bruit, l'estimation utilisant une fonction de transfert qui estime un signal qui aurait été reçu par le ou les microphones d'erreur physiques à l'emplacement virtuel. L'algorithme de microphone virtuel est utilisé pour estimer des signaux de bruit à l'emplacement virtuel sur la base du signal de bruit haute fréquence. Un signal d'annulation de bruit permet d'annuler le bruit à l'emplacement virtuel, le signal d'annulation de bruit représentant le bruit capturé par le capteur à système de correction aval et le ou les microphones d'erreur physiques, le système d'annulation active du bruit utilisant une fréquence de travail pour l'annulation active du bruit d'au moins 2 kHz.
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