Search Results for: Audio frequency electric
electronic broadcasting , although only a few were established, most commonly in european cities. these systems predated the development, in the s, of radio broadcasting. they were eventually supplanted by radio stations, because radio signals could more easily cover much wider areas with higher quality audio
particularly advanced example, clément ader prepared a listening room at the paris electrical exhibition , where attendees could listen to performances, in stereo , from the paris grand opera. [ ] the concept also appeared in edward bellamy's influential utopian novel, looking backward: - , which foresaw audio...
https://en.wikipedia.org/wiki/Telephone_newspaper