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What is a microphone?
A microphone is an acoustic-to-electric transducer or sensor that converts sound into an electrical audio signal. Microphones are used in many applications such as telephones, hearing aids, motion picture production, live and recorded audio engineering, FRS radios, megaphones, karaoke systems, megaphones, portable audio players, cordless phones, walkie-talkies, wireless microphones, loudspeakers and computers for recording voice.
How many Microphones types do we have?
Many people are confused about microphone types, so let us start with some basics. Microphones are used in recording studios to pick up sound and convert it into an electrical signal manipulated by electronic devices. There are two main types of microphones, namely dynamic and condenser microphones. Dynamic mics are rugged and ideal for on-stage use; they can handle high sound pressure levels without distorting the signal, making them perfect for live performances. Condenser mics have a diaphragm in front of a metal plate called a backplate or a variable capacitor which changes the electrical charge when sound.
How do microphones work?
A microphone converts sound waves into electrical signals and then sends those signals through wires as electric impulses. Microphones typically take the form of a transducer that generates an electrical signal when exposed to air vibrations at atmospheric pressure. Different microphones operate on different principles and utilize varying technologies to achieve this function.
When were microphones invented?
The microphone principle was first demonstrated by Édouard-Léon Scott de Martinville in 1849, using a thin sheet of metal with a horn attached to one side (later versions used discs or tubes as components). In this setup, sound waves traveling through the air vibrated a coil of wire suspended in a magnetic field.