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1. WO2017170321 - NOISE REDUCTION DEVICE

Publication Number WO/2017/170321
Publication Date 05.10.2017
International Application No. PCT/JP2017/012238
International Filing Date 27.03.2017
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
B64D 11/06 2006.01
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
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
B64C 1/40
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
1Fuselages; Constructional features common to fuselages, wings, stabilising surfaces and the like
40Sound or heat insulation ; , e.g. using insulation blankets
B64C 2220/00
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
2220Active noise reduction systems
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
Applicants
  • パナソニックIPマネジメント株式会社 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. [JP]/[JP]
Inventors
  • 荒木 潤二 ARAKI Junji
  • 窪田 憲一 KUBOTA Kenichi
Agents
  • 鎌田 健司 KAMATA Kenji
  • 前田 浩夫 MAEDA Hiroo
Priority Data
2016-06534229.03.2016JP
2016-13478007.07.2016JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) NOISE REDUCTION DEVICE
(FR) DISPOSITIF DE RÉDUCTION DE BRUIT
(JA) 騒音低減装置
Abstract
(EN)
A noise reduction device is provided with a plurality of noise microphones, a noise control unit, and a control speaker. The noise control unit generates a control sound signal for reducing the noise detected by the plurality of noise microphones at a control center of a control space. The number of sound microphones (420a) disposed at a distance less than a distance d shown in the relational expression d = d0 + t × v – λ/2 is less than the number of sound microphones (420b-420g) disposed at a distance greater than the distance d, where λ is the wavelength corresponding to a control frequency f of the plurality of noise microphones, d0 is the distance from the control center to the control speaker, t is the control delay time of the control speaker, and v is the sound velocity. The noise microphones (420b-420g) disposed in a position in which the distance from the control center is greater than the distance d are disposed such that the distances between mutually adjacent noise microphones are substantially equidistant.
(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.
(JA)
騒音低減装置は、複数の騒音マイク、騒音制御部、制御スピーカを備えている。騒音制御部は、複数の騒音マイクで検知された騒音を、制御空間の制御中心で低減するための制御音信号を生成する。複数の騒音マイクにおける制御周波数fに対応する波長をλ、制御中心から制御スピーカまでの距離をd0、制御スピーカにおける制御遅延時間をt、音速をvとすると、関係式d=d0+t×v-λ/2で示される距離dよりも短い距離に配置される騒音マイク(420a)の個数は、距離dよりも長い距離に配置される騒音マイク(420b~420g)の個数よりも少ない。制御中心からの距離が距離dよりも長い位置に配置される騒音マイク(420b~420g)は、互いに隣接する騒音マイク同士の距離が略等距離になるように配置されている。
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