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Method for testing and evaluating sound absorbing and insulating performance of automotive acoustic package

An evaluation method, sound absorption and sound insulation technology, applied in vehicle testing, machine/structural component testing, analysis of solids using sonic/ultrasonic/infrasonic waves, etc., can solve the problem of inability to comprehensively evaluate the NVH performance level of the entire vehicle, time-consuming, labor-intensive, and cost-intensive. Low test costs, simple test methods, and reduced errors

Inactive Publication Date: 2018-07-10
BRILLIANCE AUTO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the test and evaluation of the sound absorption and insulation performance (NVH performance) of automotive acoustic packaging alone requires the use of standing wave tubes or alpha acoustic cabins. The single test cannot comprehensively evaluate the NVH performance level of the whole vehicle, and can only evaluate the acoustic package itself. performance compliance
The overall NVH performance evaluation of the automotive acoustic package requires the use of a reverberation chamber. The cost of building a reverberation chamber is high, and it is time-consuming and labor-intensive to rent reverberation chambers from other companies, and the cost is not low. Test and evaluate the sound absorption and insulation performance of acoustic packaging

Method used

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  • Method for testing and evaluating sound absorbing and insulating performance of automotive acoustic package
  • Method for testing and evaluating sound absorbing and insulating performance of automotive acoustic package
  • Method for testing and evaluating sound absorbing and insulating performance of automotive acoustic package

Examples

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Effect test

Embodiment 1

[0020] Such as figure 1 -3 shows a method for testing and evaluating the sound absorption and insulation performance of automotive acoustic packaging. The equipment includes a volume sound source that emits sound signals, a microphone that receives sound signals, and data acquisition equipment that records and processes sound signals. The volume sound The source output end is respectively connected to the input end of the signal processing unit through the near-field noise acquisition unit and the noise transmission path, and the far-field noise acquisition unit; the method includes the following steps:

[0021] (1) Place the whole vehicle in a full anechoic chamber (or semi-anechoic chamber);

[0022] (2) Arrange the volumetric sound source in the passenger compartment to emit white noise with a sound pressure level not lower than 100dB(A);

[0023] (3) Arrange the microphone at a specific position, connect it with the data acquisition device, and perform initialization sett...

Embodiment 2

[0038] Such as image 3 As shown, 1 is the driver's right ear volume sound source, 2 is the front tire far-field microphone, 3 is the rear tire far-field sensor, 4 is the air intake far-field microphone, 5 is the exhaust port far-field microphone, 6 is the power The upper surface microphone of the assembly, 7 is the near-field noise collection unit of the volume sound source (with the volume sound source), 8 is the far-field noise collection unit (that is, the signal acquisition microphone after passing through each transmission path), and 9 is the signal processing unit ( That is, data acquisition equipment), 10 is a noise generating unit (that is, a volume sound source), and its connection method is the prior art, so it is omitted.

[0039] The white noise is emitted by the noise generating unit (volume sound source), and the sound signal of the noise generating unit is collected by a near-field noise acquisition unit (volume sound source belt) near the noise generating unit...

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Abstract

The invention provides a method for testing and evaluating sound absorbing and insulating performance of an automotive acoustic package. The sound absorbing and insulating performance of the automotive acoustic package is evaluated through a tested P / Q value, thereby realizing a result with higher reliability and realness, reducing a testing evaluation result error caused by an effect of number ofmicrophones or other conditions, realizing high reliability and high comprehensiveness of the result, and integrally reflecting the NVHN performance of the whole automobile. Furthermore the method isthe comprehensive, direct, quick and effective testing method which comprises common noise sources of the automobile. The method according to the invention realizes a simple testing method and has high versatility. Furthermore the method can be adapted with evaluation for noise absorbing and isolating performance of various automotive acoustic packages, and furthermore realizes low test cost.

Description

technical field [0001] The invention relates to the field of testing and evaluating the sound absorption and insulation performance of automobile acoustic packaging, in particular to a method for testing and evaluating the sound absorption and insulation performance of automobile acoustic packaging. Background technique [0002] With the popularization of automobiles, consumers have higher and higher requirements for automobile noise. The automotive acoustic package, as a barrier to the noise outside the car, has a great impact on the noise inside the car. It is very important to test and evaluate the sound absorption and insulation performance of the acoustic package on the whole vehicle. How to correctly evaluate the automotive acoustics in the early and late stages of the development of the acoustic package The sound absorption performance of packaging has always been a problem. [0003] At present, the test and evaluation of the sound absorption and insulation performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007G01N29/11
CPCG01M17/007G01N29/11G01N2291/023
Inventor 李静波王晖吴国明王珂
Owner BRILLIANCE AUTO
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