This was a program I enjoyed watching in England back in the 1960s and 70s. I remember them demonstrating the idea of noise canceling. It was a large box of electronics and speakers. Seemed to work.
Seems very dated now.
David
https://www.youtube.com/watch?v=pYbRZmKsZsQ
Seems very dated now.
David
https://www.youtube.com/watch?v=pYbRZmKsZsQ