Noise reduction method and device for vehicle

A technology for noise reduction and vehicles, which is applied in the field of noise reduction methods and devices for vehicles, and can solve problems such as the impact of noise reduction performance of active noise reduction systems, high and low intermittent, and active control system emissions.

Active Publication Date: 2020-09-29
COLSONIC SUZHOU ELECTRONICS CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] 3. Control by detecting changes in the noise field. If suppressed too early, it may affect the noise reduction performance of the active noise reduction system;
[0008] 4. After detecting the risk of divergence of the active noise reduction system, the method of resetting the active control system is ofte

Method used

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  • Noise reduction method and device for vehicle
  • Noise reduction method and device for vehicle
  • Noise reduction method and device for vehicle

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Embodiment Construction

[0056] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention.

[0057] This embodiment provides a noise reduction method for vehicles, specifically an active noise reduction method, which mainly includes the following steps:

[0058] S1. Measure the loudspeakers of each sound reproduction channel of the vehicle audio system respectively, and obtain the maximum output amplitude of the signal corresponding to each frequency point in the frequency domain without distortion;

[0059] S2. Generate a reference signal, and filter the reference signal through an adaptive filter to generate a control signal;

[0060] S3. Co...

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Abstract

The invention discloses a noise reduction method for a vehicle, and the method comprises the following steps: S1, respectively measuring a loudspeaker of each sound reproduction channel of a vehicle-mounted audio system, and obtaining the maximum non-distortion output amplitude of a signal corresponding to each frequency point in a frequency domain; S2, generating a reference signal, and filteringthe reference signal through an adaptive filter to generate a control signal; S3, comparing the control signal with the maximum output amplitude, if the control signal is not greater than the maximumvalue of the maximum output amplitude, directly converting the control signal into an analog signal, and feeding the analog signal to loudspeakers of corresponding sound reproduction channels througha power amplifier; and if the control signal is greater than the maximum value of the maximum output amplitude, performing power compression on the control signal, converting the control signal subjected to power compression into an analog signal, and feeding the analog signal to the loudspeakers of corresponding sound reproduction channels through the power amplifier. The possibility of the divergence of an active noise control system can be solved, and abnormal sound is prevented from being generated as soon as possible.

Description

technical field [0001] The invention belongs to the technical field of vehicle noise reduction, and relates to a noise reduction method and device for vehicles. Background technique [0002] With the improvement of vehicle intelligence, drivers and passengers have increasingly strict requirements on the acoustic environment in the vehicle. The noise in the car will reduce the comfort of the drivers and passengers, causing irritability and fatigue of the occupants in the car; it will also affect the clarity of communication and communication, and even affect the driver's perception of the signal sound outside the car, increasing traffic hazards. Automotive NVH (Noise, Vibration, Harshness) is an important issue car manufacturers care about. By modifying the structural design, adding damping materials or using devices such as shock absorbing springs to reduce noise, collectively referred to as passive noise control. This passive noise control method has a better noise reduct...

Claims

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Application Information

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IPC IPC(8): G10K11/178H04R3/02
CPCG10K11/1781G10K11/17853G10K11/17883H04R3/02Y02T90/00
Inventor 沐永生马登永叶超蔡野锋
Owner COLSONIC SUZHOU ELECTRONICS CO LTD
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