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Transmission in acoustics module
Posted 21 dic 2015, 16:57 GMT-5 0 Replies
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I did a simple model in COMSOL to check the influence of matching layer. So I modelled a piezo (PZT-5H), matching layer (Quartz 1978-IEEE) , which is then followed by a bone. So according to theory at lamda/4 matching thickness and matching impedance of sqrt(Zp*Zbone) I should get 100% transmission in the bone or absolute pressure in the bone should be equal to the absolute of the incident pressure.
The problem is I am not getting 100% instead I am getting only 47%. Does anybody know why it is happening? Or I am doing something wrong, since I am fairly new in COMSOL
Few details about the model:
I am exciting a plane wave with frequency of 500 KHz ( Frequency domain model) and did a parametric sweep for matching thickness width ( To see its influence). Model is ended with a well-designed PML ( scaling factor to be 15 and curvature factor be 3), that means very high absorption. Boundaries of the model are symmetric.
Hello Shreyank Gupta
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