Origin
The catchphrase initially came from a Start Trek page from the Fiveminute.com website.
It’s basically about the first Star Trek series’s episodes being parodied and textually rewritten in funny dialogues, much like fanfictions.
On February 2005, the author, Kira, posted his parody for the “Return of the Archons” episode.
The ending is written as follows:
Spock: The computer built by Landru was indeed an impressive feat of engineering, Captain. Quite fascinating.
Kirk: True, but it still wasn’t as impressive a feat of engineering as me. I’m truly a marvel of humankind.
Spock: If you say so, Captain.
Kirk: Number of supercomputers outsmarted by Spock: zero. Number of supercomputers outsmarted by Kirk: one.
Spock: But I was the one who told you that logic puzzle in the first place.
Kirk: Sorry, Spock, can’t hear you over the sound of how awesome I am.
Spock: But —
Kirk: Awesome!
Spock: Sigh.
(The Enterprise warps off at Ludicrous Speed)
THE END
http://knowyourmeme.com/memes/im-sorry-i-cant-hear-you-over-the-sound-of-how-awesome-i-am