Lush
Mods' Pet
The whole thing is a myth. Selhurst is no louder than any other ground and quieter than many, whatever it may sound like to a few deluded souls in one corner.
At the risk of derailing the thread and going over old ground, having experienced the Palace 'ultra' atmosphere, the 'clappers' at West Brom and the amplified 'drum' at Hudders, I would say that nothing beats a full stadium with good acoustics with everyone simply singing at the top of their voices.