Help with RATTLE!
Quote:
Originally Posted by sithompson 
Trying to find rattles is not cheap and I hate having rattles. There is a company near me that will attach microphones and some wizzy computer and they can track down the location. But you can do it by trial and error so long as you have a lot of time and don't mind pulling your car apart. Most rattles seem to be internal cosmetic. I had a car that had a loose spring in the passenger seat. Took me six weeks to find that out!
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I tried to put a passenger on the car to locate the source of rattle (its a very very faint rattle right after the car's wheels moved over a bump)
the problem is the noise CANNOT be heard when someone is sitting beside me, which is really weird. I have a hypothesis that the rigidity of the car took a change and resonance caused by road vibrations become more frequent but Im not sure if its correct.
My passenger chair is electrically powered so I thought that is unlikely to be the source.