Test method and test device for sound insulation performance

Abstract

The invention relates to a test method and a test device for sound insulation performance. The test method of the above-mentioned sound insulation performance comprises the following steps: setting the material to be tested on a partition, and then placing the partition in the box, the partition divides the box into at least two test layers in the vertical direction, and the uppermost The test layer is provided with an opening, and the partition is provided with one side of the material to be tested facing the opening; with the same initial conditions, multiple impactors are sequentially dropped from the opening onto the material to be tested in the box, and the test results are obtained in the first test layer. The average value of the maximum sound decibels of multiple impactors falling on the material to be tested, denoted as F1'; the average value of the maximum sound decibels of multiple impactors falling on the material to be tested obtained in the second test layer, Record it as F2'; according to F1' and F2', calculate the standard sound decibel F' of the material to be tested. The process of the above test method is simple and the test accuracy is high.

Description

technical field [0001] The invention relates to the field of sound-insulating materials, in particular to a test method and a test device for sound-insulation performance. Background technique [0002] With the development of social economy and the improvement of people's living standards, residential comfort, as one of the important indicators to measure the quality of life, is attracting more and more people's attention. Noise pollution is listed as the main problem of environmental pollution control in the 21st century. It will not only affect people's normal rest, study and work, reduce housing comfort, but also may damage people's hearing health, and even cause diseases. Among them, impact noise is an indoor One of the main sources of noise. Generally speaking, the floor is the main component that generates impact noise. For example, the collision of door and window switches, objects falling on the ground, dragging of tables and chairs, and the impact of people's heels...

AI Technical Summary

Problems solved by technology

The detection equipment of the reverberation chamber method is expensive, and the market price is hundreds of thousands of yuan, and it is only applicable to the room where the ground sound insulation material construction has been completed (the standard test method requires the reverberation chamber area to be 10m 2 ), but due to site and other conditions, it is extremely difficult to conduct frequent large-area sound insulation tests during the material development stage

However, although the amount of material used to test the sound insulation performance of the impedance tube method is small, it cannot simulate the reverberation of the actual environment, which is quite different from the actual application environment of the material, and the test accuracy is poor.

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