Measure the amount of noise accurately with a sound pressure level meter or/and acoustic spectrum analyser as the magazine do and compare scientifically.
Because adults have a different hearing sensitivity for loudness and frequency contour ...........perceived loudness must be specified as the frequency and DBSPL to be meaningful or comparable.
Increases in sound level usually come from owner abuse in that they have failed to maintain to standard or allowed marginal components to remain in service beyond the quiet useful life.
You can purchase an inexpensive SPL meter from Radio Shack and use it to provide microphone for this free software on a laptop so we can accurately understand what you are complaining about -- as noise.
[URL]http://www.qsl.net/dl4yhf/spectra1.html[/U[/URL]]
http://www.radioshack.com/prod...03667
http://www.engineeringtoolbox.....html
Unfortunately the inexpensive meters only read down to 50 dbspl
My Q is on fuel pump number 3 and none totally failed just became noisey.
Idler pulley bearings, fan blade cracks, injectors, hla, are a few of the get loud items besides fuel pumps.
http://www.t3auto.com/
