Yea I can't hear it without the loudness equalization turned on.. maybe try thathttp://www.intowindows.com/how-to-enable-loudness-equalization-in-vista/
Well here's another question.. does the [laptop] cd drive make clicking noises??
And I tried different CDs too
Yes they do make clicking and mechanical noises. That is the head assembly and the servo doing their work. The same thing happens in the desktop, but the desktop assembly is enclosed and therefore the sound is muffled and you can't hear it.
Not all of them will make out such sounds eg. the laptop i am using right now to write this, does exactly that. It makes click noises while the head is moving back and forth looking for the data on the CD/DVD (does it on both). But i have seen laptops that don't produce any sound at all, or even being noisy on CDs but not DVDs.
If you are really worried about it, visit some friends who own a laptop and see what happens with their CD drives. You can also visit a computer shop and ask the assistant to demonstrate a couple of laptops to you. Have a CD-ROM with you and ask them to put it in for you and see if they make any noise.
Unless you encounter any reading/writing problems, i wouldn't worry about it.