I'm glasses.
You're hardly the first person to have noticed this. The weird thing is that it actually seems to be a coincidence; Word of RTD is that the four-beat Master rhythm was based on his obnoxious alarm clock.
edited 7th Oct '11 10:11:03 PM by Sporkaganza
Always, somewhere, someone is fighting for you. As long as you remember them, you are not alone.
Yeah, I guess I got all excited when I saw it, should have assumed that of any show there's no Doctor Who nuance no one has noticed.
I'm glasses.
Yeah, the Doctor Who fandom is very obsessive and also pretty large, so there's not much that hasn't been noticed.
Always, somewhere, someone is fighting for you. As long as you remember them, you are not alone.
This one's pretty awesome when you first notice it, though.
Yeah, I noticed this too, but what it actually took me longer to realize, even though it's directly mentioned in the End of Time is that it's the heartbeats of a Timelord.
"Weird doors open. People fall into things."
I think that was again just a coincidence. RTD realized that two hearts could beat in a four-pulse rhythm.
Fresh-eyed movie blog
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...I want that alarm clock. 
Every cheap electronic alarm clock in the UK has that four-beat alarm beep. Mine actually builds up to it - first there's one beep to the "bar", then two, then four, then eventually it just beeps continually with no pause.
It's not an alarm clock.
And let us pray that come it may (As come it will for a' that)
This may have been noted before - I couldn't find it, although it's a hard thing to search for - but I just noticed that the rhythm for The Master when he's Saxon, the "duh duh duh duh" thing, is the same rhythm as the bassline to the main theme song of the show. Does anyone else see it?