Fancy Tech: How to Get Rid of Exhaust Drone, works great!

phelan · 10-04-2010, 05:50 PM

Quote:

Originally Posted by TeamARK

But this exhaust doesn't
ARK PERFORMANCE INC : 370z TRUE DUAL Prototype Teaser w/ dB Test.

wow, shameless plug much?

Quote:

Originally Posted by '10Anamoly

Speed of sound (typically 1100ft/sec, divided by the frequency at which drone occurs, divided by four because you want it to reflect at 1/4 the drone wavelength to cancel it out).

So for drone around 110hz-112hz (around my setup), you get to 2.5 to 2.4 ft, or 29-30".

So...to get the frequencies of your droning, you put a microphone to your exhaust and ran it through a spectrum analyzer (i.e. Audacity if you're not in a lab...haha) to get the peak frequencies? Out of curiosity, did you run any filters on the output, or was it all raw? How clean was the data?

Nothing serious, just piqued my curiosity. I like reading stuff like this.

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