Do all rx8 make an airy blowing sound at idle?

Hi

My rx8 has been making a sort of airy blowing sound when you rev it and then a the revs drop back down.

It has been doing it for years but to my it sounds like there is a leak somewhere. Is this characteristic of the rotary engine?



Does anyone have a video of their engine sound around the exhasut manifold area?



Thanks



Antony