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1. EP3438970 - NOISE REDUCTION DEVICE

Office European Patent Office
Application Number 17774858
Application Date 27.03.2017
Publication Number 3438970
Publication Date 06.02.2019
Publication Kind A4
IPC
G10K 11/178
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
B64D 11/06
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
11Passenger or crew accommodation; Flight-deck installations not otherwise provided for
06Arrangements or adaptations of seats
CPC
B64D 11/06
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
11Passenger or crew accommodation; Flight-deck installations not otherwise provided for
06Arrangements of seats, or adaptations or details specially adapted for aircraft seats
G10K 11/17854
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
17854the filter being an adaptive filter
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 11/17881
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 2210/1281
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
10Applications
128Vehicles
1281Aircraft, e.g. spacecraft, airplane or helicopter
B60R 13/0815
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
13Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
08Insulating elements, e.g. for sound insulation
0815Acoustic or thermal insulation of passenger compartments
Applicants PANASONIC IP MAN CO LTD
Inventors ARAKI JUNJI
KUBOTA KENICHI
Designated States
Priority Data 2016065342 29.03.2016 JP
2016134780 07.07.2016 JP
Title
(DE) RAUSCHVERRINGERUNGSVORRICHTUNG
(EN) NOISE REDUCTION DEVICE
(FR) DISPOSITIF DE RÉDUCTION DE BRUIT
Abstract
(EN)
A noise reduction device includes a plurality of noise microphones, a noise controller, and a control speaker. The noise controller generates a control sound signal for reducing, at a center of control in a control space, noise detected by the noise microphones. The number of noise microphones (420a) that are disposed closer than a distance d from the center of control is less than the number of noise microphones (420b through 420g) that are disposed farther than the distance d from the center of control, when the distance d is expressed as d = d0 + t × v - » / 2, where » is a wavelength corresponding to a control frequency f in the noise microphones, d0 is the distance from the center of control to the control speaker, t is the control delay time in the control speaker, and v is sound velocity. The noise microphones (420b through 420g) that are disposed farther than the distance d from the center of control are approximately equally spaced apart.

(FR)
L'invention concerne un dispositif de réduction de bruit qui comporte une pluralité de microphones de bruit, une unité de commande de bruit et un haut-parleur de commande. L'unité de commande de bruit génère un signal sonore de commande pour réduire le bruit détecté par la pluralité de microphones de bruit au niveau d'un centre de commande d'un espace de commande. Le nombre de microphones sonores (420a) disposés à une distance inférieure à une distance d représentée dans l'expression relationnelle d = d0 + t × v - λ/2 est inférieur au nombre de microphones sonores (420b-420g) disposés à une distance supérieure à la distance d, où λ est la longueur d'onde correspondant à une fréquence de commande f de la pluralité de microphones de bruit, d0 est la distance entre le centre de commande et le haut-parleur de commande, t est le temps de retard de commande du haut-parleur de commande, et v est la vitesse du son. Les microphones de bruit (420b-420g), disposés dans une position dans laquelle la distance par rapport au centre de commande est supérieure à la distance d, sont disposés de telle sorte que les distances entre des microphones de bruit mutuellement adjacents sont sensiblement équidistantes.