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System and method for reproducing sound field in aircraft cabin by multi-channel balanced feedback method

An aircraft cabin, multi-channel technology, applied in the field of sound field reproduction system in the aircraft cabin, to achieve the effect of improving acoustic comfort

Active Publication Date: 2020-10-13
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Most of the existing studies on the reproduction of the sound field in the aircraft cabin focus on a certain area, and there is no research on the reproduction of large-scale target point areas in the cabin

Method used

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  • System and method for reproducing sound field in aircraft cabin by multi-channel balanced feedback method
  • System and method for reproducing sound field in aircraft cabin by multi-channel balanced feedback method
  • System and method for reproducing sound field in aircraft cabin by multi-channel balanced feedback method

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] 1. Hardware layout of the sound field reproduction system in the aircraft cabin

[0036] The hardware layout of the sound field reproduction system in the aircraft cabin is as follows: figure 1 As shown, the measuring points are evenly arranged in the cabin and the cockpit, and the microphones are arranged at the head position of the passenger above the seat at the measuring point position for the collection of the target sound field and the reproduced sound field; the speakers equal to the number of measuring points are hung on the The measurement point is under the corresponding seat, and the speakers can be adjusted in different directions to facilitate the formation of a reverberant environment in the cabin; the microphone and the speakers are connected to the control cabinet in the control room outside the cabin through corresponding connecting lines, and f...

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Abstract

The invention discloses a system and a method for reproducing a sound field in an aircraft cabin by using a multi-channel balanced feedback method. A microphone is arranged at the position, over a seat, of the head of a passenger in an aircraft cabin, a loudspeaker is arranged under the seat under the microphone, and the microphone and the loudspeaker are in communication connection with a computer. Noise data in each state in the actual flight process is collected by the microphone arranged at a target point in the aircraft cabin to serve as a target sound field; the microphone and the loudspeaker are calibrated, an equalization matrix is measured and calculated; a multi-channel least square equalization mode is adopted for processing, and finally the loudspeaker is excited by an optimalsound source input signal to make a sound to realize reproduction of a sound field in the aircraft cabin. According to the invention, the multi-point space sound field in the cabin under various working conditions of the aircraft can be restored more accurately, a simulation experiment environment closer to the actual environment is provided, and the method can be used for improving the acoustic comfort in the cabin of the aircraft.

Description

technical field [0001] The invention relates to a sound field reproduction system and method, in particular to a sound field reproduction system and method in an aircraft cabin using a multi-channel equalization feedback method. Background technique [0002] As the world's leading aviation power, the birth of domestically produced large aircraft has made China's aviation industry truly at the forefront of the world. The design, production, manufacture, and first flight of a large aircraft involve a wide range of technologies and disciplines. The level of vibration and noise is undoubtedly of great concern to passengers. The noise level in the aircraft cabin has a great impact on the comfort of passengers. Whether a large aircraft can truly compete with or surpass foreign models is an important factor, so it is of great significance to study the noise and sound quality in the aircraft cabin. [0003] To study and optimize the sound quality in the aircraft cabin, we must firs...

Claims

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Application Information

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IPC IPC(8): H04S7/00H04R29/00
CPCH04R29/001H04R29/004H04S7/00H04S7/305H04S2400/11H04S2400/15
Inventor 郑旭于泳刘联鋆邱毅
Owner ZHEJIANG UNIV
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