Is 40.0 dB noisy?

Could someone give my an example on how noisy it is
is for a Graffics card fan
http://www.overclockers.co.uk/showproduct.php?prodid=HS-003-ZT&groupid=701&catid=57&subcat=787
eg. as noisy as….
Answer #1
I THINK, my friend has that he said its extremely loud, unable to sleep, maybe wrong cooler but I think its that one.