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1. WO2020094733 - AN ACTIVE NOISE CANCELLATION SYSTEM FOR A HELMET

Publication Number WO/2020/094733
Publication Date 14.05.2020
International Application No. PCT/EP2019/080430
International Filing Date 06.11.2019
IPC
A42B 3/16 2006.01
AHUMAN NECESSITIES
42HEADWEAR
BHATS; HEAD COVERINGS
3Helmets; Helmet covers
04Parts, details or accessories of helmets
16Ear protection devices
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
H04R 1/10 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
1Details of transducers
10Earpieces; Attachments therefor
A61F 11/14 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
11Methods or devices for treatment of the ears, e.g. surgical; Protective devices for the ears, carried on the body or in the hand
06Protective devices for the ears
14external, e.g. earcaps or earmuffs
Applicants
  • DAAL NOISE CONTROL SYSTEMS AS [NO]/[NO]
Inventors
  • FLADMARK, Bent Even Fossum
  • LARSEN, Ronny Fagervik
  • LOE, Dag Axel Aarset
  • BIRKELAND, Sigmund Andreas
Agents
  • SUCKLING, Andrew
Priority Data
1818094.306.11.2018GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) AN ACTIVE NOISE CANCELLATION SYSTEM FOR A HELMET
(FR) SYSTÈME DE RÉDUCTION ACTIVE DE BRUIT POUR CASQUE
Abstract
(EN)
An active noise cancellation (ANC) system has a mounting plate (10), a first face of which is configured to be disposed against an inner surface of a helmet to form, with the helmet, a chamber. When the mounting plate is mounted on the helmet, a loudspeaker (7) provided on the first face of the mounting plate is within the chamber. The plate (10) has an aperture (13) for allowing transmission of sound from the loudspeaker to a spatial region. At least one reference microphone (3) is mounted on a second face of the plate. The plate (10) acts as a mounting plate for components of the ANC system, and so simplifies the process of installing an ANC system to a helmet. Also, the plate serves to define a chamber that accommodates the loudspeaker of the ANC system and provides good acoustic coupling of the sound signal from the loudspeaker of the ANC system into the quiet zone of the ANC system.
(FR)
La présente invention concerne un système de réduction active de bruit (ANC) qui comporte une plaque de montage (10), dont une première face est configurée de façon à être disposée contre une surface interne d’un casque pour former, avec le casque, une chambre. Lorsque la plaque de montage est montée sur le casque, un haut-parleur (7) disposé sur la première face de la plaque de montage est situé à l’intérieur de la chambre. La plaque (10) comporte une ouverture (13) pour permettre la transmission de son du haut-parleur vers une région spatiale. Au moins un microphone de référence (3) est monté sur une deuxième face de la plaque. La plaque (10) agit en tant que plaque de montage pour des composants du système ANC, et simplifie ainsi le processus d’installation d’un système ANC sur un casque. En outre, la plaque sert à définir une chambre qui reçoit le haut-parleur du système ANC et assure un bon couplage acoustique du signal sonore depuis le haut-parleur du système ANC dans la zone silencieuse du système ANC.
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