A kind of material sound-absorbing performance testing device and testing method
A testing method and a testing device technology, which are applied to the analysis of materials, the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, instruments, etc., can solve the problems of consuming a lot of manpower and material resources and low test efficiency, and achieve high test efficiency and high practical value , the overall structure is simple
Active Publication Date: 2021-12-14
DONGFENG MOTOR CORP HUBEI
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Problems solved by technology
[0004] The disadvantages of the above two testing methods are: both need to be carried out in the laboratory, have certain special requirements for the site, and both need to be operated by professionals. The testing process will consume a lot of manpower and material resources, and the testing efficiency is not high.
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Embodiment 2
[0055] see figure 1 and figure 2 As shown, the embodiment of the present invention provides a method for testing the sound-absorbing performance of a material. The method uses the above-mentioned device for testing the sound-absorbing performance of a material. The test method includes the steps of:
[0056] S1. Place the sound insulation cover 1 at a place where no sound-absorbing material is placed, and measure the reverberation time T when no sound-absorbing material is placed through the test module 2, microphone 13 and speaker 12 1 ;
[0057] S2. Place the sound insulation cover 1 on the sound-absorbing material to be tested, and measure the reverberation time T when the sound-absorbing material is placed through the test module 2, the microphone 13 and the speaker 12 2 ;
[0058] S3. Calculate the sound absorption coefficient when the sound absorption material is placed according to the sound absorption coefficient calculation formula, and the sound absorption coeffi...
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The invention discloses a material sound-absorbing performance test device and a test method, which relate to the technical field of noise control, and include a sound insulation cover and a test module, wherein the sound insulation cover includes a semi-closed cover body with an opening at the bottom, and at least one For the loudspeaker and several microphones, the bottom of the cover is provided with at least one layer of sealing tape; the test module is connected to the sound insulation cover, and the test module includes a data acquisition and analysis system, a power amplifier, a signal generator and computer. The device for testing the sound-absorbing performance of materials provided by the invention can quickly obtain test results. The device has a simple structure, easy operation, high test efficiency, and has no special requirements for test sites and operators, and has high practical value.
Description
technical field [0001] The invention relates to the technical field of noise control, in particular to a material sound-absorbing performance testing device and testing method. Background technique [0002] With the rapid development of the automobile industry, people have increasingly strict requirements on the noise control of automobiles. In order to improve product competitiveness and meet customer needs, the development of sound-absorbing performance of complete vehicles and system components is particularly important. Therefore, in competitive product benchmarking and test verification The stage requires a large number of material sound-absorbing performance test experiments. [0003] In the prior art, there are mainly two methods for testing the sound-absorbing performance of materials. One is the standing wave tube method. The incident waves add to create a standing wave inside the tube. The standing wave ratio is measured by moving the position of the probe, and f...
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IPC IPC(8): G01N29/11
CPCG01N29/11G01N2291/0235
Inventor 张科峰岛影茂邓峰陈建武谷军庆
Owner DONGFENG MOTOR CORP HUBEI