3.1+IO+Microphones

In **1877, Emile Berliner ** invented the first microphone A microphone is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. Sound information exists as patterns of air pressure; the microphone changes this information into patterns of electric current. Microphones can be used online to communicate with friends and family. Or they can be used on your phone; it’s actually a necessity on most phones.
 * __Microphones - Input devices __**
 * Or simply they are used to amplify the voice **
 * Skype
 * Work purposes
 * In a studio
 * Karaoke
 * On the computer