At constant idle:
Rhut, rhut, rhut, rhut, rhut, rhat
Rhut, rhut, rhut, rhut, rhut, rhat
Rhut, rhut, rhut, rhut, rhut, rhat
Not sure if this is any different than normal as far as sound. just seems louder than usual. It jumped out at me when i was paying a toll and with the echo effect and window down it was very clear. My exhaust is loud so its hard to hear sometimes.