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Old 05-10-2016, 09:18 AM   #75
GoneFarrell
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City: La Conner, WA
Country: USA
Vessel Name: Imagine
Vessel Model: Farrell 34
Join Date: Oct 2015
Posts: 239
OK, if you guys think logSPL app is cool, go google "spectrum analyzer for iPad".

A spectrum analyzer shows you what frequencies things are vibrating at and how "loud" they are. That means you don't have to guess on the noise source, you can tell if it's RPM related, prop speed related, or a fundamental of what ever the forcing function is.

Last time I used one of these it cost $28K and lived on a roll around cart! Now it's an app for a phone or tablet! These things have become the Star Trek Tricorder for boats, amazing.
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