Impulse Response

In signal processing, the impulse response, or impulse response function (IRF), of a dynamic system is its output when presented with a brief input signal, called an impulse. More generally, an impulse response refers to the reaction of any dynamic system in response to some external change. In both cases, the impulse response describes the reaction of the system as a function of time (or possibly as a function of some other independent variable that parameterizes the dynamic behavior of the system).

For example, the dynamic system might be a planetary system in orbit around a star; the external influence in this case might be another massive object arriving from elsewhere in the galaxy; the impulse response is the change in the motion of the planetary system caused by interaction with the new object.

In all these cases, the 'dynamic system' and its 'impulse response' may refer to actual physical objects, or to a mathematical system of equations describing these objects.

Read more about Impulse ResponseMathematical Considerations, Practical Applications

Other articles related to "impulse response, impulse, response, impulses":

Convolution Reverb
... and uses a pre-recorded audio sample of the impulse response of the space being modeled ... To apply the reverberation effect, the impulse-response recording is first stored in a digital signal-processing system ... be processed (reverberated) with the samples in the impulse response file ...
Convolution Reverb - Creation of Impulse Responses
... An impulse response is a recording of the reverberation that is caused by an acoustic space when an ideal impulse is played ... However, an ideal impulse is a mathematical construct, and cannot exist in reality, as it would have to be infinitesimally narrow in time ... A recording of this approximated ideal impulse may be used directly as an impulse response ...
Time Stretch Analog-to-digital Converter - Impulse Response of The Photonic Time-stretch (PTS) System
... interfere destructively, creating nulls in the frequency response of the system ... Although it may seem that the dispersion penalty places a fundamental limit on the impulse response (or the bandwidth) of the time-stretch system ... results in a transfer function with a flat response in the frequency domain ...
Impulse Response - Practical Applications - Economics
... in contemporary macroeconomic modeling, impulse response functions describe how the economy reacts over time to exogenous impulses, which economists usually call 'shocks', and are often ... Impulses that are often treated as exogenous from a macroeconomic point of view include changes in government spending, tax rates, and other fiscal policy parameters changes in the monetary base or other monetary ... Impulse response functions describe the reaction of endogenous macroeconomic variables such as output, consumption, investment, and employment at the ...
LTI System Theory - Discrete-time Systems - Impulse Response and Convolution
... case of the Kronecker delta function, the output sequence is the impulse response For a linear system, must satisfy (Eq.4) And the time-invariance requirement is (Eq.5) In ... the output sequence can be calculated in terms of the input and the impulse response ... Equivalently, the system's response to an impulse at n=0 is a "time" reversed copy of the unshifted weighting function ...

Famous quotes containing the words response and/or impulse:

    Tears are sometimes an inappropriate response to death. When a life has been lived completely honestly, completely successfully, or just completely, the correct response to death’s perfect punctuation mark is a smile.
    Julie Burchill (b. 1960)

    If the oarsmen of a fast-moving ship suddenly cease to row, the suspension of the driving force of the oars doesn’t prevent the vessel from continuing to move on its course. And with a speech it is much the same. After he has finished reciting the document, the speaker will still be able to maintain the same tone without a break, borrowing its momentum and impulse from the passage he has just read out.
    Marcus Tullius Cicero (106–43 B.C)