We do it in lessons with our really stupid maths teacher. He thinks it comes from outside (even thought it only happens when it is our lessons, strange... :P)
My mate has got one of a police siren aswell, it sounds really realistic. Ill try and get it for ya.
Did it once on a packed bus. Because it starts off really quiet, everbody thinks its from outside or something. Everybody was like 'whats that noise?' You cant tell where the sound is coming from
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http://www.sitalchauhan.pwp.blueyonder.co.uk/Other/Whistle-Sital.mp3
I think this is what you was looking for...
My mate has got one of a police siren aswell, it sounds really realistic. Ill try and get it for ya.
Did it once on a packed bus. Because it starts off really quiet, everbody thinks its from outside or something. Everybody was like 'whats that noise?' You cant tell where the sound is coming from