N95 8GB - Strange beeps

Haven't noticed anything like that on mine. What applications have you (or someone else) installed on your phone?

I get beeps when I'm on GPRS networks as the phone has to drop packet data connection to make the call. Basically it can't do push email at the same time as the call and that's what the beeps are telling you. It shouldn't do it while you're on a 3G network and is nothing to worry about anyway (although it's a bit disconcerting).