Question

who sold the speaker and when​

Answer 1

Answer:

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Answer 2

Answer: The First Loudspeakers

Edison received a British patent while Tesla did not. In 1898, Horace Short developed a mechanism for amplifying sound using compressed air and he sold the rights to Charles Parsons. Record companies then began selling record players that used loudspeakers with this system.Aug 14, 2020

Inventor: Werner von Siemens

Explanation: Smart speaker sales reached new record of 146.9M in 2019, up 70% from 2018. Global smart speaker sales hit a record high last year with shipments of 146.9 million units, up 70% over 2018, according to a recent report on the state of the smart speaker market from Strategy Analytics