Method and a device for treating noise on board an aircraft
First Claim
Patent Images
1. A device for treating noise in the cabin (20, 200, 201) of an aircraft (21), the device comprising:
- a plurality of microphones (22 to 24) fastened to respective seats (35) of the cabin;
a plurality of loudspeakers (26, 27);
at least one treatment unit (28) arranged to receive noise measurement signals delivered by the microphones, and to deliver control signals to the loudspeakers for the purpose of attenuating the noise in the cabin, the treatment unit comprising a plurality of treatment modules associated with respective ones of the microphones and/or of the loudspeakers; and
at least one acoustic resonator (29 to 32) acoustically coupled to a loudspeaker and to the cabin;
the acoustic resonator including a vent (29 to 31) coupled to a cavity (32), the loudspeaker and its associated resonator presenting a frequency (33 or 34) of maximum sound level (50, 500) that is less than 1000 Hz.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a device for treating noise in the cabin (20) of an aircraft, the device comprising:
- a plurality of microphones (22 to 24) fastened to respective seats (35) of the cabin;
- a plurality of loudspeakers (26, 27);
- at least one treatment unit (28) arranged to receive noise measurement signals delivered by the microphones, and to deliver control signals to the loudspeakers for the purpose of attenuating the noise in the cabin, the treatment unit comprising a plurality of treatment modules associated with respective ones of the microphones and/or of the loudspeakers; and
- at least one acoustic resonator (29 to 32) including a vent (29 to 31) coupled to a cavity (32) and connecting a loudspeaker to the cabin;
- the acoustic resonator including a vent (29 to 31) coupled to a cavity (32), the loudspeaker and its associated resonator presenting a frequency (33 or 34) of maximum sound level (50, 500) that is less than 1000 Hz.
17 Citations
20 Claims
-
1. A device for treating noise in the cabin (20, 200, 201) of an aircraft (21), the device comprising:
-
a plurality of microphones (22 to 24) fastened to respective seats (35) of the cabin;
a plurality of loudspeakers (26, 27);
at least one treatment unit (28) arranged to receive noise measurement signals delivered by the microphones, and to deliver control signals to the loudspeakers for the purpose of attenuating the noise in the cabin, the treatment unit comprising a plurality of treatment modules associated with respective ones of the microphones and/or of the loudspeakers; and
at least one acoustic resonator (29 to 32) acoustically coupled to a loudspeaker and to the cabin;
the acoustic resonator including a vent (29 to 31) coupled to a cavity (32), the loudspeaker and its associated resonator presenting a frequency (33 or 34) of maximum sound level (50, 500) that is less than 1000 Hz. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method of attenuating noise on board an aircraft (21) having a cabin (20, 200, 201) fitted with a plurality of loudspeakers (26, 27) and a plurality of noise measurement sensors (22 to 24), the method comprising the following steps:
-
filtering the signals from each sensor to extract low frequency noise components and generating a loudspeaker control signal at least on the basis of the filtered signals in order to attenuate the sensation of noise perceived by the occupants of the cabin; and
coupling the loudspeaker to the cabin via an acoustic resonator (29 to 32) improving the efficiency of the loudspeaker at low frequencies, the acoustic resonator having a vent (29 to 31) coupled to a cavity (32), the loudspeaker and its associated resonator presenting a frequency (33 or 34) of maximum sound level (50, 500) that is less than 1000 Hz. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. A device for treating noise in the cabin (20, 200, 201) of an aircraft (21), the device comprising:
-
a plurality of microphones (22 to 24) fastened to respective seats (35) of the cabin;
a plurality of loudspeakers (26, 27);
at least one treatment unit (28) arranged to receive noise measurement signals delivered by the microphones, and to deliver control signals to the loudspeakers for the purpose of attenuating the noise in the cabin, the treatment unit comprising a plurality of treatment modules associated with respective ones of the microphones and/or of the loudspeakers; and
at least one acoustic resonator (29 to 32) acoustically coupled to a loudspeaker and to the cabin;
the acoustic resonator including a vent (29 to 31) coupled to a cavity (32), the loudspeaker and its associated resonator presenting a frequency (33 or 34) of maximum sound level (50, 500) that is less than 1000 Hz, and in which the treatment unit includes a member (38) for psychoacoustic weighting of the signals received from the microphones or the signals delivered to the loudspeakers. - View Dependent Claims (18, 19, 20)
-
Specification