Do you think there is a background sound of the universe

Sound cannot travel in a vacuum.

Go on youtube and type in "The sound of the universe" or more specifically, "The sound of (Insert name of planet". They also have recording for the Sun:D

http://en.wikipedia.org/wiki/Musica_universalis

Yes, it is the sound of a large rubber fallace being whipped through the air by a drunk girl at a party in a poor neighborhood. While the souls of a thousand men die and are reborn simultaneously. During which, someone on a porch in Mississippi is playing a jug as a musical instrument. That my friend is the sound of the oneness and unity of the universe. Gone unheard by those who choose not to listen.

No it is just the air whistling through your head. Do not worry.

There is no air is space therefore sound cannot travel through space

Haha nice question. I have no idea but still it's a nice thought

It sounds like colors, maaaaan

No, but there are background microwave radiations from when it started expanding.

If anything it probably sounds similar to a toilet filling back up after its done flushing.

I think it makes a sound, but maybe not one we can percieve as humans. Hmmm...I think it sounds something like a singing bowl or the ringing of a crystal glass full of water.