Via news.com.au:
WHEN you watch a movie, your ears are lying to you.
During a fight scene, you probably thought you heard someone getting punched. Wrong.
What you actually heard was a chicken carcass getting smashed by a baseball bat.
And that’s just the tip of the iceberg.
Here’s the truth about some of the most famous sound effects in movie history:

Star Wars — Lightsabers:
Legendary sound designer Ben Burtt is the man behind one of the most iconic sound effects in movie history.
“I was a projectionist and we had a projection booth with some very, very old simplex projectors in them,” said Burtt, who has won four Academy Awards.
“They had an interlock motor which connected them to the system when they just sat there and idled and made a wonderful humming sound. I went and recorded that sound, but it wasn’t quite enough.”
Burtt felt it was still lacking a “buzzy sort of sparkling sound”, but he discovered the missing element by accident when he was walking past a muted TV with a microphone.
“It picked up a transmission from the television set and a signal was induced into its sound reproducing mechanism, and that was a great buzz, actually. So I took that buzz and recorded it and combined it with the projector motor sound and that fifty-fifty kind of combination of those two sounds became the basic lightsaber tone.”
In order to achieve the noise of the lightsaber whipping back and forth for those epic fight scenes, Burtt played the standard lightsaber noise over a loudspeaker in a room “and then took another microphone and waved in the air next to that speaker so that it would come close to the speaker and go away and you could whip it by”.

Star Wars — Chewbacca’s voice:
The signature sound of the loveable hairball is actually “mostly bears, with a dash of walrus, dog, and lion thrown in,” sound man Ben Burtt said.

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