Dolby
At the end of 1963, at the age of 30, the American engineer Ray Dolby traveled through India on behalf of UNESCO to record sitar music in the ashrams. He was very annoyed by the quality of the recordings, which permanently produced a soft murmur. On his return to England in May 1965, he set up a small firm (four employees) in London to develop a noise cancellation system. In November he was able to give a demonstration to the record company Decca Records.