|Originally posted by Marvin McInnis:|
I think you may be onto something. Why not fix the likely problem before trying to engineer a work-around?
I wont be using this as a work around, more of a nifty project that will help me narrow down the noise. Then I could use this device to listen to the engine for added safety, if the knock sensor should fail to report knock. Ive been reading that some folks can hear audible knock(with this device) even when the knock sensor doesnt report any. The idea is to build the electronic det can and port it into the laptop or the head unit and try to use the EQ to filter out noise from the lifters and other normal noise makers. Also I would like to find a software download that can identify the frequency range of certain sounds for added filtering, then I will attach the MIC to various parts of the engine or chassis. Im thinking if I tap on parts of the exhaust and frame and find the average frequency, then I could use the software to quiet down every other sound except for the one im searching for. I think you see where im going with this. If the cheap project works out well then I will spend more time/$$$ to build something better and use a modern wideband AC generating knock sensor, or even a strain gauge sensor. Down the road I may also use this to tune the exhaust using 1/4 wave resonators, just need to figure out what frequency is the most obnoxious and attenuate it.
Where can I find a software download that can identify and filter out certain freq bands? Im no sound engineer so humor me lol