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Originally Posted by TOOSTUBBORN2FAIL
Depends how you tune it. My car has several helmholtz resonators inside, tuned to be out of phase from the main resonant frequencies of the car, to improve acoustics.
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[citation needed] a Google search string would suffice. Commercial product?
shovel -- I've taken to thinking of turbulence as noise, and the vehicle as an inside out musical instrument; with the optimum in making it as quiet as possible. I don't know where to take that, except maybe putting an array of microphones in areas of interest.