Soundcard noise level

guwakzhai

Member
2010-04-09 10:07 am
hello there.. this is the first time i create a thread here.. please forgive me if i've done anything wrong.. :eek:

i've tested my Creative Sound Blaster X-Fi Surround 5.1 usb soundcard with RMAA and got the result of noise level as attached..

my question is why is the noise increases towards lower freq starting from 300Hz? :confused::confused: who's the culprit?

[IMGDEAD]http://img513.imageshack.us/img513/3492/newscnoiselevel.jpg[/IMGDEAD]
[IMGDEAD]http://yfrog.com/e9newscnoiselevelj[/IMGDEAD]