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1. WO2020193937 - NOISE CONTROL

Publication Number WO/2020/193937
Publication Date 01.10.2020
International Application No. PCT/GB2020/050441
International Filing Date 25.02.2020
IPC
A62B 18/00 2006.01
AHUMAN NECESSITIES
62LIFE-SAVING; FIRE-FIGHTING
BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
18Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes
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
A62B 15/00
AHUMAN NECESSITIES
62LIFE-SAVING; FIRE-FIGHTING
BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
15Installations affording protection against poisonous or injurious substances, e.g. with separate breathing apparatus
A62B 18/003
AHUMAN NECESSITIES
62LIFE-SAVING; FIRE-FIGHTING
BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
18Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes ; or incorporating a pump or compressor for reducing the inhalation effort
003having means for creating a fresh air curtain
A62B 18/006
AHUMAN NECESSITIES
62LIFE-SAVING; FIRE-FIGHTING
BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
18Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes ; or incorporating a pump or compressor for reducing the inhalation effort
006with pumps for forced ventilation
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 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 11/17825
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
17825Error signals
Applicants
  • DYSON TECHNOLOGY LIMITED [GB]/[GB]
Inventors
  • REID, Peter
  • DARLING, Philip
Agents
  • CHAPMAN, Alan
  • BOOTH, Andrew
  • MACPHERSON, Carolyn
  • HOBDAY, Duncan
  • MITCHELL, Joshua
  • MACKISACK, Anna
  • WARNER, Thomas
  • FOWLER, Maria
  • MACPHERSON, Craig
  • FORRESTER, Simon
Priority Data
1903969.222.03.2019GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) NOISE CONTROL
(FR) LUTTE CONTRE LE BRUIT
Abstract
(EN)
There is provided an ear cup comprising a housing containing a filter assembly and a motor- driven impeller for creating an airflow through the filter assembly, the housing comprising an air outlet downstream from the filter assembly for emitting the filtered airflow from the housing. The ear cup further comprises an acoustic driver carried by or mounted to, either directly or indirectly, the housing, a reference internal noise sensor disposed within the housing, and a reference ambient noise sensor carried by or mounted to, either directly or indirectly, the housing. The ear cup further comprises active noise control circuitry that is configured, in a first operating state, to use a signal provided by the reference internal noise sensor to operate the acoustic driver and, in a second operating state, to use a signal provided by the reference ambient noise sensor to operate the acoustic driver.
(FR)
La présente invention concerne une oreillette comprenant un boîtier contenant un ensemble filtre et une roue entraînée par un moteur pour créer un flux d'air à travers l'ensemble filtre, le boîtier comprenant une sortie d'air en aval de l'ensemble filtre pour émettre le flux d'air filtré à partir du boîtier. L'oreillette comprend en outre un dispositif d'entraînement acoustique porté par ou monté sur, soit directement, soit indirectement, le boîtier, un capteur de bruit interne de référence disposé à l'intérieur du boîtier, et un capteur de bruit ambiant de référence porté par ou monté sur, soit directement, soit indirectement, le boîtier. L'oreillette comprend en outre un circuit de commande de bruit actif qui est configuré, dans un premier état de fonctionnement, pour utiliser un signal fourni par le capteur de bruit interne de référence pour faire fonctionner le pilote acoustique et, dans un second état de fonctionnement, pour utiliser un signal fourni par le capteur de bruit ambiant de référence pour faire fonctionner le pilote acoustique.
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