Why is my Ubuntu partition louder than my Windows partition

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http://askubuntu.com – My laptop came with Windows preinstalled. I shrank the Windows partition and created a couple of new partitions to install Ubuntu in. I've noticed that reading my Ubuntu partitions is much noisier than reading the NTFS partiion. This applies whether I am running Windows or Ubuntu - reading/writing any data to my Ubuntu partition makes the hard drive fairly noisy, whereas reading/writing any data to my NTFS partitions is much quieter. What could be the reason behind this? It's all on the same hard drive and can't have anything to do with the operating systems themselves as the results are repr (HowTos)