MacBook Pro early 2008 speaker squeaking?

[Tyler Zman]

The other day i noticed that my early 2008 15'' MacBook Pro was squeaking. I waited a little bit, and it went away, but when I press one of the volume buttons it starts squeaking again, it will also start squeaking when I play something with audio, like a youtube video or a song on itunes. when there is nothing playing through the speakers it will eventually stop. Another thing is when I use headphones you can hear the squeaking through them also. This is a very annoying problem is there anybody that can help me fix this.
To be more specific with the noise it makes its kind of like a tea kettle when its squeaking.