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Welcome! Need support, you got it. Or share your ideas and experiences.

RE: He is right but is referring to low level detail

look at the young modulus for PETs :2-2.7 vs aluminum 69 GPa.

The air resistance is linear to velocity/proportional to rate of strain, at 50 db spl at the membrane we are talking 0.02 Pa. peak membrane speed would be about 20 u m/s. We can figure out what the pressure equivalent of the perforated plate's resistance would be.

What I am saying is that the limiting factor dominating resistance to diaphragm motion is different at various output levels. That any of them is linear does not matter since there is a different slope at each level.



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