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      08-08-2013, 08:10 AM   #125
bradleyland
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Quote:
Originally Posted by Boss330 View Post
Is this whistling noise on the MB CLA there just to disguise engine RPM's?
I don't know what the heck that whistling noise is, but it won't prevent a Fast Fourier Transform analysis of the engine RPM. To do that, you'd need to produce a tone similar in frequency to the primary combustion impulse. That whistle is way too high-pitched. Maybe it's a harmonic, but each multiple you move from the fundamental, the benefit of confusing the base frequency would be diminished. That whistle would have to be a shriek.
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