Automobile noise reduction structure and noise reduction method

A technology for automobiles and noise reduction, which is applied in the direction of sound-emitting devices, instruments, microphone ports/microphone accessories, etc. It can solve the problems of increased vehicle weight, difficult maintenance, complicated wiring, etc., and achieves reduced vehicle weight, simple wiring, and improved ride quality. car feel effect

Pending Publication Date: 2021-11-30
朝阳聚声泰(信丰)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The shortcomings of the current vehicle noise reduction layout method are: each node (microphone, sensor) must be connected to the host b

Method used

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  • Automobile noise reduction structure and noise reduction method
  • Automobile noise reduction structure and noise reduction method
  • Automobile noise reduction structure and noise reduction method

Examples

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[0033] Example 1:

[0034] like figure 1 , image 3 with Figure 4 As shown, the present invention discloses a car noise reduction structure and a noise reduction method, including the car body, the wheel position of the car body, and the vibration sensor 2 is fixed, and there are four cars outside the car body. 1, car body interior Fixed a plurality of car microphones 3, four car outer microphones 1 are connected in series, and the four vibration sensors 2 are connected in series, and the car host 4 is connected, and the car microphone 3 is connected to the power amplifier 5;

[0035] The noise reduction method adopted by the car noise reduction structure contains the following steps:

[0036] Step 1: Collect the outer wind noise data by the car outside the microphone 1, collect the tire vibration and acceleration data by vibration sensor 2;

[0037] Step 2: Code calculation processing for the acquired data to obtain the corresponding time period waveform;

[0038] Step 3: Based on...

Example Embodiment

[0048] Example 2:

[0049] like Figures 2 to 4 As shown, the present invention discloses a car noise reduction structure and a noise reduction method, including the car body, the wheel position of the car body, and the vibration sensor 2 is fixed, and there are four cars outside the car body. 1, car body interior Fixed a plurality of car microphones 3, four car outer microphones 1 are connected in series, and the four vibration sensors 2 are connected in series, and the car host 4 is connected, and the car microphone 3 is connected to the power amplifier 5;

[0050] The noise reduction method adopted by the car noise reduction structure contains the following steps:

[0051] Step 1: Collect the outer wind noise data by the car outside the microphone 1, collect the tire vibration and acceleration data by vibration sensor 2;

[0052] Step 2: Code calculation processing for the acquired data to obtain the corresponding time period waveform;

[0053] Step 3: Based on the time band wav...

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Abstract

The invention relates to the field of active noise reduction of finished automobiles and particularly relates to an automobile noise reduction structure and a noise reduction method. The automobile noise reduction structure comprises an automobile body, wherein vibration sensors are fixed to the positions of wheels of the automobile body, four external microphones are arranged outside the automobile body, and a plurality of internal microphones are fixed in the automobile body; the four external microphones are connected in series and then connected with an automobile host, the four vibration sensors are connected in series and then connected with the automobile host, and the internal microphones are all connected with a power amplifier. Only two wires are needed, the microphone outside the vehicle and the vibration sensor can be connected in series, wiring harnesses are few, wiring is simple, maintenance is convenient, and the vehicle weight is effectively reduced; vehicle manufacturing cost can be reduced, and the riding feeling is improved.

Description

【Technical field】 [0001] The invention relates to the field of vehicle active noise reduction, in particular to an automobile noise reduction structure and a noise reduction method. 【Background technique】 [0002] With the global climate change, the automobile industry in various countries began to switch to new energy sources of fuel. The sources of noise in fuel vehicles include tire noise, wind noise, and engine noise. The sources of noise in new energy vehicles are less engine noise. High-end cars are usually equipped with active noise reduction. Function, its working principle is: the noise signal received by the microphone installed in a specific area in the car cabin and the engine speed information will be input to the car power amplifier, and the power amplifier will use its internal unique algorithm to make the car speaker send out a signal that is consistent with the engine Waveform of the second harmonic noise inversion. Due to the interference effect of waves, ...

Claims

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Application Information

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IPC IPC(8): G10K11/178H04R1/08
CPCG10K11/178H04R1/08G10K2210/1282
Inventor 陈文新康良军郭奕君
Owner 朝阳聚声泰(信丰)科技有限公司
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