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what is a microphone
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Microphone:

A microphone (colloquially called a mic or mike) is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. Microphones are used in many applications such as telephones, tape recorders, karaoke systems, hearing aids, motion picture production, live and recorded audio engineering, FRS radios, megaphones, in radio and television broadcasting and in computers for recording voice, speech recognition, VoIP, and for non-acoustic purposes such as ultrasonic checking or knock sensors.

Most microphones today use electromagnetic induction (dynamic microphone), capacitance change (condenser microphone), piezoelectric generation, or light modulation to produce an electrical voltage signal from mechanical vibration.

Specifications:

Item:Hisonic HT-1012

         On and Off Switch

         3 Level Volume Controller

         Sensitivity - 72.5 dB

         Frequency Response 50Hz - 16KHz

         Impedance. 600

         Cardioids polar pattern picks up the most sound from in front of the microphone and some sound from the sides.

         Includes 15ft. (4.57m) XLR-1/4" cable.

         Steel mesh ball grille with integral "pop" filter reduces explosive breath sounds and wind noise.

         Shipping Weight: 2 Lbs