Macbook Pro trackpad making clicking noise

Recently I heard my trackpad making a clicking noise that I had never heard before on my Macbook Pro. I recorded the sound the trackpad was making (it only makes this sound when I click on the trackpad and it can only eb heard on certain parts of the trackpad when clicked on).

This recording is five clicks with the normal trackpad sound and then five with the clicking trackpad sound: http://vocaroo.com/i/s01WbycAo5UO

This recording is of mainly the clicking trackpad sound: http://vocaroo.com/i/s14Q81xG9oE1

Is this normal or is this something that should be looked at by an Apple employee?