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Computers and Technology, 15.01.2020 17:31 sryun

The telephone, invented in 1876, converted acoustic sound to electric signals. however, the audio production industry began using the electrical recording system only in 1925. why was there a delay in using this technology in audio production?
the missing piece of technology that prevented the audio production industry from using the electrical recording system earlier was a device that could blank the electric signal. the device that made this possible was the blank

fill in the blank

a amplify
b codify
c transmit

a stylus
b diaphragm
c audion valve

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