Without knowing the noise dB volume or the kind of noise, it's hard to give you any definitive answer. Kind of like saying, my car is noisy.
Here is a web site that lets you listen to abnormal "bad", onorous sounds hard drives on life support make. Five are from Seagate, but listen to most of them.http://datacent.com/hard_drive_sounds.php
If it's not a similar sound, then it's probably physiologic. Many cases now mount their HDD's with rubber washers to prevent noise transfer, and insulated cases to prevent noise transfer.