Would you be willing to answer a few brief questions about PlayStation Forums?
Happens to everyone. I think I read somewhere not too long ago that Granzella is aware of it and are working on a fix.
You are not alone. Everyone hears this unfortunate sound.
It seems to be a linked to the floaters.
Sounds like two squids rubbing together. Or really wet flip flops.
Maybe it's all the tourists, pervs, or trolls constantly snapping pictures.