Device for measuring sound absorption and sound insulation coefficients of underwater acoustic material based on reverberation method

Abstract

The invention belongs to the field of acoustic measurement, and in particular, relates to a device for measuring sound absorption and sound insulation coefficients of an underwater acoustic material based on a reverberation method. The device includes a first reverberation box, a second reverberation box and a third reverberation box; structures of the first reverberation box and the second reverberation box are the same, are each a cuboid structure, each have no top cover and are prepared by welding steel plates; the center of the side part of the first reverberation box and the center of the side part of the second reverberation box are welded with flanges; one side of the first flange is provided with a first organic glass plate, one side of the second flange is provided with a second organic glass plate, and the other sides of the flanges are connected with the third reverberation box; the bottom parts of the first reverberation box and the third reverberation box are provided with pin rollers. Acoustic states of the first reverberation box and the second reverberation box can be guaranteed to be not changed, the influence of an experimental error in the process of measurement is reduced, the ability of acoustic waves in the first reverberation box propagated from the third reverberation box to the second reverberation box is weakened, and the influence of boundary conditions in the process of measurement is reduced.

Description

technical field [0001] The invention belongs to the field of acoustic measurement, and in particular relates to a measurement device for sound absorption and sound insulation coefficient of underwater acoustic materials based on a reverberation method. Background technique [0002] The performance characteristics of acoustic materials (sound absorption coefficient, sound insulation coefficient, reflection coefficient, and transmission coefficient) are important parameters that must be considered when realizing acoustic stealth of underwater vehicles. At present, the performance parameters of acoustic materials measured by the acoustic tube method (standing wave tube method, pulse tube method), near-field acoustic holography, etc., obtain the sound absorption coefficient and sound insulation coefficient when the sound wave is normal or obliquely incident. In practice, because it is difficult to know the incident direction of the underwater sound wave, the acoustic parameters ...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of underwater acoustic material sound absorption and sound insulation coefficient measurement device based on the reverberation method to solve the detection problem of the acoustic performance of the underwater acoustic material in the current acoustic test

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