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Active noise reduction method and device for vehicle

An active noise reduction and vehicle technology, which is applied to vehicle components, transportation and packaging, and sound-generating equipment, etc., can solve the problems of low applicability, too many speakers and sensors, and the inability to open windows for noise reduction, etc. High reliability, simple equipment assembly, and increased noise reduction difficulty

Active Publication Date: 2017-09-22
GEELY AUTOMOBILE INST NINGBO CO LTD +1
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AI Technical Summary

Problems solved by technology

However, this kind of on-board ANC is mainly aimed at the second harmonic noise of the engine, and cannot reduce the noise of the window opening
In building noise reduction, active window noise control has been reported, that is, in the window open state, the research and development personnel use 16 speakers for active noise control, and arrange an error sensor in front of each speaker, but due to the Too much, not very applicable

Method used

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  • Active noise reduction method and device for vehicle
  • Active noise reduction method and device for vehicle
  • Active noise reduction method and device for vehicle

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Embodiment Construction

[0053] figure 2 A schematic structural diagram of an active noise reduction device for a vehicle according to an embodiment of the present invention is shown. The active noise reduction device may generally include: at least one reference microphone, at least one control sound source, a receiver, a computer and a sound generator. Wherein, the reference microphone is arranged at the side wall of the vehicle for collecting window noise of the vehicle window. The control sound source is arranged at the window frame of the vehicle, the arrangement of the control sound source is based on not affecting the opening and closing of the vehicle window, and it is used to emit a sound signal capable of canceling the window noise. The receiver is connected with the reference microphone and is used for receiving the sound signal of the window noise transmitted by the reference microphone. The computer is used to solve the control gain of the feed-forward ANC control using the active nois...

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Abstract

The invention provides an active noise reduction method and device for a vehicle and belongs to the technical field of noise control. The active noise reduction method comprises the following steps: arranging at least one reference microphone at the side body of the vehicle, and collecting window noise of a vehicle window by utilizing the reference microphones; arranging at least one control sound source at a window frame of the vehicle window, and utilizing the control sound source to emit a sound signal for counteracting the window noise; obtaining a reference signal according to the window noise collected by each reference microphone; and superposing the reference signal and the sound signal emitted by the control sound source and calculating control gain of reedforward ANC control to enable sound power of the superposed sound signals to be minimum. The noise reduction method can significantly decrease interior noise of the vehicle under a window-open state, reduces ear sound pressure of a driver and passengers and improves vehicle-taking experience and driving comfort.

Description

technical field [0001] The invention relates to the technical field of noise control, in particular to an active noise reduction method and device for vehicles. Background technique [0002] Noise, Vibration, Harshness (NVH) is a comprehensive problem to measure the quality of vehicle manufacturing. The NVH problem of vehicles is one of the concerns of major vehicle manufacturers and parts companies in the international auto industry. However, in the NVH issue of vehicles, researchers basically only pay attention to the NVH performance inside and outside the vehicle with the windows closed. This is because the sound field structure inside the car is destroyed after the window is opened, and the noise will be seriously deteriorated, and the lifting range of the window regulator and the vehicle speed will directly affect the noise inside the car. Therefore, the noise inside the car with the window open is generally not affected. Included in the development process of NVH. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/178G10K11/28B60R16/037
CPCB60R16/0373G10K11/178G10K11/28
Inventor 毛杰朱凌
Owner GEELY AUTOMOBILE INST NINGBO CO LTD
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