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2024-02-23T23:08:22Z

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'''Ringing''' is a phenomenon that occurs in various fields such as [[electronics]], [[telecommunications]], and [[medicine]]. It refers to the oscillation of a system, particularly the unwanted persistence of a signal after the cessation of an excitation.

== In Electronics ==
In [[electronics]], ringing is the unwanted oscillation of a voltage or current. It happens when an electrical signal or system, such as a square wave, is suddenly changed. This can be due to a sudden interruption in power, a switch being flipped, or a load being applied or removed. The system then oscillates at its natural frequency until the energy is dissipated. Ringing artifacts in [[signal processing]] are often unwanted and need to be reduced or eliminated.

== In Telecommunications ==
In [[telecommunications]], ringing refers to the sound made by a telephone to indicate an incoming call. The term is derived from the fact that the original telephones had a large, metal bell that rang when an incoming call was received. Modern telephones use a variety of sounds and patterns to indicate incoming calls.

== In Medicine ==
In [[medicine]], ringing can refer to a condition known as [[tinnitus]], where a person hears a constant or intermittent sound in their ears or head when no external sound is present. This can be a ringing, buzzing, hissing, chirping, whistling, or other sound. Tinnitus can be a symptom of many different conditions, including hearing loss, ear injury, or a circulatory system disorder.

== See Also ==
* [[Oscillation]]
* [[Signal processing]]
* [[Tinnitus]]

[[Category:Electronics]]
[[Category:Telecommunications]]
[[Category:Medicine]]

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Ringing - Revision history

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