From Wikipedia, the free encyclopedia

In electrical circuits, ringing is an unwanted oscillation of a voltage or current. It is caused when an electrical pulse causes the parasitic capacitances and inductances in the circuit (i.e. those that are not part of the design, but just by-products of the materials used to construct the circuit) to resonate at their characteristic frequency. Ringing artifacts are also present in square waves.

Ringing is undesirable because it causes extra current to flow, thereby wasting energy and causing extra heating of the components; it can cause unwanted electromagnetic radiation to be emitted; and it may cause unwanted triggering of bistable elements in digital circuits.

This electronics-related article is a stub. You can help Wikipedia by expanding it.

In hearing, ringing is an endaural phenomenon in which a person hears a sound, somewhat like a sine tone, without any external acoustic stimulation. Ringing in the ears commonly follows exposure to loud noises, and is a sign of damage to the hair cells of the inner ear. Ringing in the ears is a common sort of tinnitus.

This medical sign article is a stub. You can help Wikipedia by expanding it.

Bird ringing is using individually-numbered small metal leg rings placed on birds' legs to track their activity.

Ringing current is the pulsating DC current that powers a telephone bell.

In video, closely spaced repeated ghosts of a vertical or diagonal edge where dark changes to light or vice versa, going from left to right. The electron beam upon changing from dark to light or vice versa instead of changing quickly to the desired intensity and staying there, overshoots and undershoots a few times. This bouncing could occur anywhere in the electronics or cabling and is often caused by or accentuated by a too high setting of the sharpness control.

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.