The King's Speech (2010)

Factual error: In the scene of King George V's 1934 Christmas Broadcast from Sandringham, there are factual errors. The B.B.C. Engineers are shown operating Outside Broadcast equipment in a room adjacent to the King - but the equipment (BBC Type OBA/8) didn't even come into service until 1938. It should have been type OB/7 in large mahogany cases. Also, the ornate Royal microphone cases were the wrong ones. These were the later (c1937) type first used by King Edward VIII in his Broadcast in 1936.

Trivia: David Seidler won an Academy Award for Best Original Screenplay for this film. At the age of 73, Seidler was the oldest person to win the Award.

Question: I don't know anyone who stammers so I'm asking here: That trick Lionel pulled when he had Bertie reading with the earphones on and the music blasting - does it really work? Bertie obviously thinks he's still stammering, but don't stammerers sense if they're doing it even if they can't hear themselves speaking? And if it does work, why the drama with the radio broadcasts? Bertie could have put the earphones on and simply read the broadcast like he did "Hamlet".