beeping

I've noticed recently that occasionally when I floor it there will be a long quiet beep that seems to come from the engine bay. Anyone experienced this?

Hi, So basically I've had my 2012 TT for a year now and it's still in warrantee... a couple weeks ago I noticed a really random beep/click noise on my right shoulder in the back! It sounds a lot like the Parking sensor noise, only a little quieter! It comes in no rhythm, when at a standstill...