Well depends on the car... On a car with a turbo charger that is what you are hearing. Or, I've heard whistles coming from exhaust leaks as well as those little prank whistles you can stick in the back of exhaust.
Amplitude = "Loudness" In that a direct increase in amplitude will cause the sound to be "louder".
It means that the amplitude of the soundwaves is increased, or is increasing if the sound continues to get louder.
the sound gets louder
The amplitude (The height of the wave) of the wave increases as the sound gets louder.
if you have a sound and its not bothering you but if it comes louder and louder this is what you need 2 do you have to move an dmake sure you ears are not enfected ----
phat
when the dowsing machine bleeps it means u r near a hidden item the closer u get the louder/faster the sound gets
If it gets faster and louder when you rev the engine it might be a lifter in your valve train. Not hearing it i don't totally know.
It gets louder or quieter.
It gets louder and then gets quieter
Electrical energy gets converted to sound energy. When we speak into the speaker, our sound waves get converted into electrical signals. These signals get amplified and emitted as louder sound. Thus, electrical energy (electrical signals) gets converted into sound energy (amplified/louder sound).
baffles corrode, filling shrinks and gets pulverised, so the sound gets louder, and back-pressure drops. in short, it's wear-n-tear.