It is hard to know what you consider to be noisy.
My old Seagate 1TB was dead silent. In fact the only drive I found loud was my WDC Black 2TB, but it was FAST too.
Most drives have a seek noise(kind tk tk tk, but not a loud click click click.). These noises happen when the drive is in in use seeking(moving back and forth) data to read or write. It many cases it sounds like a low rumble sound.
Lucky enough drive seeks are quieter on many drives than they used to be.
Seeking sounds like this. Please note this site uses flash and has advertisements. I need to find a better option for hosting. This was uploaded a while ago.
http://tinypic.com/r/10or11u/5
Some drives will park the drive heads when not in use. This is a much louder sound sometimes and sounds like a drive that is powering up or down. The motor does not tend to stop so it is just a single noise without the revving up sound of a normal startup from power off. I do not have a recording of this.
If a drive goes click click click, many users refer to this as the click of death. I highly doubt you have this, but it is something to know about.