Transient (oscillation)
Get Transient Oscillation essential facts below. View Videos or join the Transient Oscillation discussion. Add Transient Oscillation to your topic list for future reference or share this resource on social media.
Transient Oscillation
Pulse signal
Induced transient oscillation

A transient event is a short-lived burst of energy in a system caused by a sudden change of state.

The source of the transient energy may be an internal event or a nearby event. The energy then couples to other parts of the system, typically appearing as a short burst of oscillation.

Electrical Engineering

In electrical engineering, oscillation is an effect caused by a transient response of a circuit or system. It is a momentary event preceding the steady state (electronics) during a sudden change of a circuit[1] or start-up. Most circuit principles such as inductor volt-second balance, capacitor ampere-second balance ignore transient states and are valid only for steady state.

Mathematically, it can be modeled as a damped harmonic oscillator.

An example of transient oscillation can be found in digital (pulse) signals in computer networks.[2] Each pulse produces two transients, an oscillation resulting from the sudden rise in voltage and another oscillation from the sudden drop in voltage. This is generally considered an undesirable effect as it introduces variations in the high and low voltages of a signal, causing instability.


In electrical and electronic engineering such electromagnetic pulses (EMP) occur internally as the result of the operation of switching devices. Engineers use voltage regulators and surge protectors to prevent transients in electricity from affecting delicate equipment. External sources include lightning (LEMP), electrostatic discharge (ESD) and nuclear EMP (NEMP).

Within Electromagnetic compatibility testing, transients are deliberately administered to electronic equipment for testing their performance and resilience to transient interference. Many such tests administer the induced fast transient oscillation directly, in the form of a damped sine wave, rather than attempt to reproduce the original source. International standards define the magnitude and methods used to apply them.

The European standard for Electrical Fast Transient (EFT) testing is EN-61000-4-4. The U.S. equivalent is IEEE C37.90. Both of these standards are similar. The standard chosen is based on the intended market.


The typical sound of some musical instruments is also characterized by transients, which can be heard when striking a percussion instrument or the strings of a string instrument.[3]

See also


  1. ^ Nilsson, James W, & Riedel, S. Electric Circuits, 9th Ed. Prentice Hall, 2010, p. 271.
  2. ^ Cheng, David K. Field and Wave Electromagnetics, 2nd Ed. Addison-Wesley, 1989, p. 471.
  3. ^ Gibson, William A. (2007). The Ultimate Live Sound Operator's Handbook. NY: Hal Leonard Books. p. 77. ISBN 978-1-4234-1971-6.

External links

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



Music Scenes