No advice about the voices!!! All I can say is that they are a universal experience!
Nightclubs are a prime tinnitus trigger, as are headphones! Its safe to continue going clubbing, but a word of advice, make sure there are lots of people between you and the speakers to absorb the sound, nightclubs in the uk well exceed safe decibel levels so if you're on the dancefloor take regular breaks.
You might want to invest in a pair of musicians earplugs. They are made to order and so are expensive, but are worth every penny so theyll allow you to go to places like clubs and bars and listen to the music while cutting out the dangerous frequencies!
Info is available on them from the RNID, or you might want to speak to the tinnitus helpline on 08457090210.
Look after yourselves as you know what the CAA are like come anything like this. Best not to ever mention it, they'll just panic and assume that you're going deaf which couldnt be further from the truth.
Wish you luck and a good nights sleep!
GatportAirwick