play music in it, me thinks.
Easy, buy a S/C.
It can be a hole in your exhaust system or it can have something to do with your engine.
It sounds like your truck has a vacuum leak. If the truck cannot build up proper vacuum pressure it will not operate properly.
Sound deadening like fatmat, or dynamat
Check the fan belt; it may need to be tightened.
You wont hear much of a sound, but more of a vibration at certain speeds. I recently installed a set of tires on my truck and because of an inbalance, around 70mph the truck would start to shake. Once I had it corrected it was smooth sailing.
Yes
the sound will get louder until you cant ignore it
A big long loudHONK!
Like honk honk
I think it should be vroom vroom. There are several onomatopoeias for it.