![]() One of the loud-speaking telephone receivers used in what was called then a “Public Address Telephone System” ( picture source). The crowd had “the unusual sensation of having spoken messages come to them out of the air” (source: Electrical Review, May 31, 1919). These 112 loud-speaking telephone receivers with large horns-in other words, loudspeakers-amplified the speeches of the event and made it audible to the crowd of approximately 10,000 people (my experience with numbers in these kinds of descriptions is that they might be exaggerated, but in the pictures, the crowd seems at least quite large). The picture above was made in 1919 during the Victory Liberty Loan and the lamp-like objects hanging above the crowd are so-called loud-speaking telephone receivers. ![]() An early example of a sound reinforcement system: 112 loud-speaking telephone horns in New York ( picture source) ![]()
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