rob73

ive heard posts about this before but cant remeber where....i keep hearing a blowing over a bottle top noise also sounds like an unsurpressed radio whineing away when i accelarate gently. It makes this noise before i go on boost. I will say it holds boost fine so i dont think its a leak on my fmic & apart from this noise car runs fine. 1995 wrx,does anyone have an idea what could be causing this noise? thanks.