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Effective Output Level

The microphone sensitivity rating defined as the ratio in dB of the power available relative to sound pressure.
Microphone

The microphone sensitivity rating defined as the ratio in dB of the power available relative to sound pressure.

A microphone, colloquially nicknamed mic or mike (/maɪk/), is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, sound recording, two-way radios, megaphones, radio and television broadcasting, and in computers for recording voice, speech recognition, VoIP, and for non-acoustic purposes such as ultrasonic sensors or knock sensors.

Several types of microphone are in use, which employ different methods to convert the air pressure variations of a sound wave to an electrical signal. The most common are the dynamic microphone, which uses a coil of wire suspended in a magnetic field; the condenser microphone, which uses the vibrating diaphragm as a capacitor plate; and the piezoelectric microphone, which uses a crystal of piezoelectric material. Microphones typically need to be connected to a preamplifier before the signal can be recorded or reproduced.

Key Terms

effective output level
electrical signal
microphone
microphone sensitivity rating
microphones
mike
power
pressure
ratio db
transducer

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Effective Output Level
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Last modified on June 18 2019
Content adapted from Wikipedia
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