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Showing results for tags 'altered resonance frequeny? causing pressure irritation and pressure at ears.'.

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  1. Hi need help from you guys who understands soundproofing and noise better. I've recently soundproofed the trunk and the floor pan of my VW passat. Used CAE equivalent of dynamat, CAE VB4.5 , 3M thinsulate. Firstly the road noise "seemed" louder but I'm guessing it is because I've brought the whole noise floor down too much and therefore accentuating road noise further. Secondly there seems to be pressure building up my ears and it's causing minor irritation whenever I drive. My guess is the deadening lowered the resonant frequency of the car panels too much causing it to resonate and drone. The drone is quite low frequency and it is not very audible. You can feel the difference if you turn on and off the engine of the car at idle but it is not heard, more "felt". Has anyone has this problem before? I thought it was the problem of my ears so i drove my wife's prius. The prius is noisier of course, but the cabin feels more "airy" and less "pressurized" and doesn't have that feeling that i have.