Excessive laptop noise!

Hello Rmn__,

I would be concerned too if the fan on my MacBook Pro was running louder and more often then usual. Occasionally this may indicate that the System Management Controller (SMC) needs to be reset:

Indicators

After performing normal troubleshooting, these symptoms may indicate that an SMC reset could be necessary.

Fans

The computer's fans run at high speed although the computer is not experiencing heavy usage and is properly ventilated.

Use these steps to reset the SMC on your MacBook Pro. Note that there are different steps depending on if your MacBook Pro has a removable battery:

Resetting the SMC on Mac portables with a battery you can remove

Note: Learn about removing the battery on MacBook and MacBook Pro.

1. Shut down the computer.
2. Disconnect the MagSafe power adapter from the computer, if it's connected.
3. Remove the battery.
4. Press and hold the power button for 5 seconds.
5. Release the power button.
6. Reconnect the battery and MagSafe power adapter.
7. Press the power button to turn on the computer.

Resetting the SMC on portables with a battery you should not remove on your own

Note: Portable computers that have a battery you should not remove on your own include MacBook Pro (Early 2009) and later, all models of MacBook Air, and MacBook (Late 2009).

1. Shut down the computer.
2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
4. Release all the keys and the power button at the same time.
5. Press the power button to turn on the computer.

Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.

You can find the full article here:

Intel-based Macs: Resetting the System Management Controller (SMC)

http://support.apple.com/kb/ht3964

Thank you for using Apple Support Communities.

Best,

Sheila M.