Thomas Morgan Robertson, known by the stage name Thomas Dolby, is an English musician, producer, composer, entrepreneur and teacher.
Dolby performing in 2018
Dolby performing in 2006
PPG WAVE 2.2
A ringtone is the sound made by a telephone to indicate an incoming telephone call. Originally referring to the sound of electromechanical striking of bells or gongs, the term refers to any sound by any device alerting of an incoming call.
Electromechanical ringer in a 20th century landline telephone
A tone ringer IC: ITT SAA 1094