When i was in labour at the hospital with my son, the midwife asked if id like a 'birthing cd' on so i said yes.
It sounded like whales and rainforests and all sorts, anyway when the midwife left i was polite but made my OH turn it right off as it got ok my nerves.
I suppose it depends on different people, in my labour i mainly wanted silence as i got quite irritated with fuss and noise lol.