RB25DET NEO Turbo noise normal?

[sledgehammer]

Hi all,

how does the stock turbo of the R34 GTT sound during acceleration/boost?
I almost cannot hear mine. It has a very high pitched whistle (not loud) and on highest boost moment there is a weird "drrrrrr" noise. I have no idea if that's normal. 
During pressure release there is also no sound at all. I know by installing an aftermarket BOV you get that typical loud blow off sound. But again.. is it normal that there is no sound at all?

Boost gauge shows that everything is fine though. No boost control.

I try to upload a sound file later. 

[GTSBoy]

Plastic compressor wheel is very quiet.

[niZmO_Man]

What intake do you have?

[sledgehammer]

Thanks for the replies. Stock intake. Someone told me that it is the sound of the nylon turbo fan, when it's about to say "goodbye". He had the same issue with an 2JZ. A bit worried about it.