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Alan D. Blumlein was born in Hampstead in London on 29 June, 1903. He was born to German parents of Jewish descent. He was a famous British electronics engineer who was known for his important inventions of sound recording, telecommu-nication, radar and, most importantly, stereo. He was a noteworthy engineer and inventor of his time, who alone had 128 patents during his time.
In 1931, he invented the stereophonic sound (stereo), which was also known as 'binaural sound'. He became a famous name for this invention of his. In the earlier inventions the sound recording system had only a single speaker, which was very disconcerting. The genesis of his idea of making a stereo though was very uncertain at the beginning, but he was given patent under the title of 'improvements in and relating to sound–transmission, sound recording and sound reproducing system'. Some of the features of the stereo designed by him at that time are still in use today.  He passed away on 7 June, 1942.