the history of the microphone By: Liam Geyer By lynncomm1 Period: Sep 18, 1870 to Sep 18, 2050 history of the microphone Sep 20, 1910 the first microphone was invented, the 4AA Sep 20, 1920 the first omni diretional microphone was invented, the 618-A Sep 20, 1930 the civic opera started using sound condensers Sep 20, 2050 in the futer, the mic. will be able to detect the slightest sounds
