Question

how stephen hawking talks ?

Answer 1

by pressing the buttons of a device at his hand and a computer like machine

Answer 2

Explanation:

Here's How Stephen Hawking Used His Cheek Muscle To Communicate With The World. ... Hawking was given 2 years to live, but he went to live on for more than half a century. Source: ABC News. Hawking used a speech-generating device developed by Intel that helps with speech/writing for people who have trouble communicating.