Scythe Silent BOX SBX-1000 Review
 

A hard drive silencer and cooler which utilizes rubber and Heatlane to achieve its goals. Does it succeed? Read on to find out

http://www.madshrimps.be/gotoartik.php?articID=340

Only marginal improvement in noise, isn't it?

dBA meter does not pick up change in pitch of the noise; .wav recordings done by SPCR let you hear difference better; I have no trustworthy microphone..

Filtering out the high pitch; unwanted high frequency sound ;)