Device for testing sound absorption performance of porous metal material under variable parameter temperature field
A technology of porous metal and testing device, which is applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, which can solve the problems of high testing cost and large area of test pieces.
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[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings:
[0022] See figure 1 , 2 , A testing device for the sound absorption performance of porous metal materials in a variable parameter temperature field, comprising a speaker 1, an impedance tube 2, a heat preservation heating body 5, a test piece heating body 9 and a microphone probe; the low temperature zone of the impedance tube 2 (fixed method The end of the flange 16 is provided with a speaker 1, which is used to generate white noise signals; the middle of the high temperature zone of the impedance tube 2 (the right side of the fixed flange 16) is provided with a heat preservation heating body 5 to ensure the inside of the impedance tube 2 The temperature field in the area close to the test piece is uniform; a microphone probe hole is provided between the heat shield 8 of the high temperature zone of the impedance tube 2 and the heat preservation heating body 5, ...
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