Alarm clock for my neighbor
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Re: Alarm clock for my neighbor
After having 4 different aftermarket exhausts on the same car over 10 years, I believe you will find that the measured noise level increases with age as the sound deading materials break up with age and blow out the exhaust pipe.
Of course the noise frequency spectrum changes as the system warms/heats up.
Of course the noise frequency spectrum changes as the system warms/heats up.