Microphones are used for transmitting sound. For this, they are one of the essential elements for a successful presentation. Whether you are an event presenter or an emcee (MC) or a keynote speaker, you will definitely need a microphone to reach out to and be heard by your audience as clearly as possible.
http://amazingonlinefacts.blogspot.com/2014/12/the-many-kinds-of-microphones-then-and.html
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