Active noise reduction in the proximity of a passenger seat
First Claim
1. Device for active noise reduction in a proximity of a passenger seat in a passenger aircraft, in particular an aircraft with a jet engine, wherein the passenger seat has a head region, the device comprising:
- at least one measurement microphone for arrangement in immediate vicinity of the head region of the passenger seat;
a signal processing device;
wherein a measurement signal generated by the at least one measurement microphone is input to the signal processing device;
wherein the signal processing device generates a first output signal which is amplified and in counter-phase to the measurement signal;
a reproduction device for arrangement in the vicinity of the head region of the passenger seat;
wherein the first output signal is input to the reproduction device for driving the reproduction device;
a monitoring microphone for arrangement in the vicinity of the head region of the passenger seat;
wherein the monitoring microphone is adapted for generating a second output signal which is input to the signal processing device.
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Accused Products
Abstract
The present application describes a device for active noise reduction in the range of a passenger seat of an airplane or a land-based or water-based vehicle, respectively, the elements of which are either integrated into the passenger seat, or are installed in the immediate vicinity thereof. In the immediate vicinity of the head region of a passenger seat, at least one measurement microphone is disposed, the measurement signal of which is lead to a signal processing device. An output signal in counter-phase and amplified with respect to the measurement signal is generated there, serving for driving a reproduction device disposed in the vicinity of the head region of the passenger seat. At least one monitoring microphone is provided in the vicinity of the head region of the passenger seat, the output signal of which is lead to a further input of the signal processing device.
20 Citations
12 Claims
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1. Device for active noise reduction in a proximity of a passenger seat in a passenger aircraft, in particular an aircraft with a jet engine, wherein the passenger seat has a head region, the device comprising:
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at least one measurement microphone for arrangement in immediate vicinity of the head region of the passenger seat;
a signal processing device;
wherein a measurement signal generated by the at least one measurement microphone is input to the signal processing device;
wherein the signal processing device generates a first output signal which is amplified and in counter-phase to the measurement signal;
a reproduction device for arrangement in the vicinity of the head region of the passenger seat;
wherein the first output signal is input to the reproduction device for driving the reproduction device;
a monitoring microphone for arrangement in the vicinity of the head region of the passenger seat;
wherein the monitoring microphone is adapted for generating a second output signal which is input to the signal processing device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Method of actively reducing a noise in a proximity of a passenger seat in a passenger aircraft, the method comprising the steps of:
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generating a measurement signal;
generating a first output signal which signal is in counter-phase to the measurement signal and which is amplified in comparison to the measurement signal;
driving a reproduction device by inputting the first output signal to the reproduction device;
generating a second output signal by means of a monitoring microphone an inputting the second output signal to the signal processing device for generating the first output signal.
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Specification