Professor Stephen Hawking speech on the NHS

The transcript describes the speaker's journey in overcoming communication challenges. Initially, an interpreter helped clarify their words. Later, a computer expert introduced the Equalizer program, enabling word selection via a head switch. Currently, the speaker uses ACAT technology by Intel, controlled by a sensor. The speaker shares personal experiences with voice recognition, emphasizing the importance of maintaining their unique voice identity.

What challenges did the author face before receiving the computer program?

What is the significance of the switch in the author's head?