i noticed that when i am accelerating i hear a buzzy noise along with the motor and along with the exhaust, when i let off the gas and let the car "hang" with the rpms dropping....the buzz is in intervals....not perfect intervals but on and off.....the buz is like a fly hitting a window (if you know wat that sounds like lol) anybody else get this? i thinking if i should take it to the dealer or not....

what i hear is wing being sucked out

Exhaust leak?