Sound innovation for WWII (player piano) (1 янв 1940 г. – 1 янв 1945 г.)

Описание:

There is a need for secure radio trasmission because of the war effort. Hedy Lamarr and a sound innovator combine efforts to create a player piano which can play by itself. The technology is then applied to missiles so that missile transmissions can't be intercepted. This innovation is dismissed by the military however.

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