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Receipt of the first patent for the microphone
On March 4, 1877, American inventor Emile Berliner patented a voice transmitter containing charcoal powder placed between two metal plates. That was what we call now “microphone”.
It is worth noting that one year earlier The Bell Telephone Company had developed its own microphone for the already existing technological miracle – the telephone. That device was called a liquid (or capacitor) transmitter and made some noise. Often the transmitted speech was simply incomprehensible.
Berliner was able to refine and amplify the transmitted sounds and thus invented a kind of telephone transmitter with a loose contact which he called a microphone.