People are in awe of the extraordinary video of Stephen Hawking speaking without using a voice synthesizer.

Extraordinary footage of Stephen Hawking speaking without use of his voice synthesizer has people blown away

However, before using a synethizer, Hawking's ability to communicate was aided by interpreters. (Santi Visalli/ Getty Images)

Many people probably member Stephen Hawking's voice as the voice aided by a synthesizer. (Bruno Vincent/ Getty Images)