Acoustic impedance tube acoustic performance test auxiliary test device

Abstract

The invention aims to provide an acoustic impedance tube acoustic performance test auxiliary test device which comprises a test piece cylinder and a sound source cylinder, one end of the test piece cylinder is connected with the sound source cylinder, the other end of the test piece cylinder is provided with a rear cover, a sound source is arranged in the sound source cylinder, a to-be-tested sample is placed in the test piece cylinder, and a grooved scale is arranged in a storage area of the to-be-tested sample. A thin clamping groove for mounting a fixing needle is formed in the size information position of the grooved scale; and a side square cover is arranged on the side of the test piece cylinder in the storage area of the to-be-tested sample. The test piece cylinder is provided with the side square cover, so that a to-be-tested sample can be conveniently and quickly taken out or placed; the problem of combined testing of various materials and an air layer can be well solved by using the combination of the fixing needle and the grooved scale, and the thickness and the relative position of a sample to be tested can be accurately determined; for a thin material, an experimental sample can be ensured to be simultaneously vertical to a pipe wall and a horizontal plane, and a to-be-tested sample is ensured to be parallel to a sound source to ensure the accuracy of experimental data; the device has the advantages of safety, reliability, simplicity in operation, novel structure and the like.

Description

technical field [0001] The invention relates to an acoustic test device, in particular to an acoustic impedance tube acoustic test device. Background technique [0002] Acoustic impedance tube is a standard test equipment for testing the normal sound absorption performance of small-sized sound-absorbing materials or structures. In the theoretical research and product design of sound-absorbing materials or structures, the acoustic impedance tube is a universal and indispensable A few test devices have been widely used. For the basic test principle and basic structure of acoustic impedance tubes, please refer to "Measurement of Sound Absorption Coefficient and Acoustic Impedance in Acoustic Impedance Tubes Part 2: Transfer Function Method". [0003] In the acoustic impedance tube, a test piece is required to store the sample to be tested, and the position of the sample to be tested and the microphone is determined according to the experimental requirements. Install the sampl...

AI Technical Summary

Problems solved by technology

However, this device is cumbersome to take and place the sample to be tested, and cannot solve the problem of placement of thin film materials.

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