DEAD AIR

The US release was May 11, 2010.
The other difference between this and the other audio stories is
that The Doctor acts as the first person narrator for the story.
Synopsis:
"Hello, I'm the Doctor. And, if you can hear this, then one of us is going to die."
At the bottom of the sea, in the wreck of a floating radio station, a lost recording has been discovered. After careful restoration, it is played for the first time – to reveal something incredible. It is the voice of the Doctor, broadcasting from Radio Bravo in 1966.
With the help of feisty Liverpudlian Layla and some groovy pop music, he must trap the Hush and destroy it – before it can escape and destroy the world...
"This is a gratifying achievement which pays tribute to the combined talents of writer James Goss, reader David Tennant, and the AudioGO production team who created a multi-layered adventure for the Doctor combining voice, music and atmospheric special sound." -
Michael Stevens, Commissioning Editor, AudioGO
Dead Air won Best Audio of the Year by over 40% public vote.
"Goss absolutely nails Tennant’sDoctor’s way of speaking and sustains it for the duration of his script, and inevitably David Tennant’sperformance is wonderfully evocative of his televised portrayal.
Tennant also gives distinctive voices to the three supporting characters that, thanks in no small part to the way that they are written, are each instantly recognisable."
- doctorwhoreviews.co.uk - E.G. Wolverson
I was pleasantly surprised to hear his vocalizations of the other character were well done.

Tennant provided each character their own voice to the point that it almost sounded like a multi-cast performance.
David Tennant’s acting skills, I already knew about, but to find out he can perform some vocal gymnastics to make the story more fun, makes him that much more my favorite doctor…An excellent Doctor Who adventure that stays true to continuity and the essence of the Doctor himself.”
Gil T.’s Pleasures - Book Review Blog