
	Where results make sense

Topic: Impulse response

Related Topics

Infinite impulse response

Kalman filter

Impulse

Angular velocity

Velocity

Computer vision

Quantity theory of money

Woolwich

In the News (Tue 14 Feb 12)

EXECUTIVE POWER

Iran

ANALYSIS

Pakistan

Family compact

	YMEC software - Realtime Analyzer Program Manual - Impulse response measurement guide
		For example, when the impulse (a very short sound with a flat frequency response) is emitted from the stage of a concert hall, the time series of the reflected sound is recorded at the audience seat.
		Impulse response is widely used for investigating the acoustical properties of sound fields, such as concert halls, recording studios, and listening rooms.
		Once the impulse response is gained, the transfer function (frequency response function) between the sound source and the listening point is obtained by the Fourier transform.
	www.ymec.com /manual/era/impulse.htm (2885 words)

	Infinite impulse response - Wikipedia, the free encyclopedia
		IIR (Infinite impulse response) Filters have an impulse response function which is non-zero over an infinite length of time.
		This is in contrast to finite impulse response filters (FIR) which have fixed-duration impulse responses.
		This feedback results in an unending impulse response characterized by either exponentially growing, decaying, or sinusoidal signal output components.
	en.wikipedia.org /wiki/Infinite_impulse_response (477 words)

	Impulse-Response Representation
		In addition to difference-equation coefficients, any LTI filter may be represented in the time domain by its response to a specific signal called the impulse.
		This response is called, naturally enough, the impulse response of the filter.
		In the physical world, an impulse may be approximated by a swift hammer blow (in the mechanical case) or balloon pop (acoustic case).
	ccrma.stanford.edu /~jos/filters/Impulse_Response_Representation.html (185 words)

	Spectral Dynamics -
		The usefulness of the impulse technique lies in the fact that the energy in an impulse is distributed continuously in the frequency domain rather than occurring at discrete spectral lines as in the case of periodic signals.
		The response to overloads is important because it is desirable to have the amplitude of the force and response signals as high as possible relative to the input range of the equipment in order to minimize noise, and variations in the impacting can frequently cause overloading.
		The frequency response was measured for the grinder both with the spindle rotating and with it stationary.
	www.spectraldynamics.com /impulse.htm (6429 words)

	ITS: Radio Channel Impulse Response Measurement Systems
		The purpose of multiple impulse measurements is to quantify the varying filter characteristics of the communication channel along both the time and spacial dimensions.
		Modeling of the impulse response has also been used for the simulation of the radio channel which, in turn, can determine the effects of the propagation channel on the signal itself.
		In addition, the impulse response, once determined, can be used to simulate the actual received signal as it is distorted through the propagation channel by convolving the impulse response with the transmitted signal.
	www.its.bldrdoc.gov /programs/rcirms/index.php (446 words)

	Kalman filter for channel impulse-response adaption in receivers for TDMA mobile radio systems - Patent 5615208
		However, since the channel impulse response coefficients on both sides of the fading incursion are correlated with one another, it is quite possible to use the estimated channel impulse responses on the left-hand side to deduce those on the right-hand side of the fading incursion.
		An estimated channel impulse response h.sub.i (k) is assigned to each sector A.sub.i in the k-th step; this estimated value of the channel impulse response is used for the detection of the sector.
		is the correlation of the l-th component of the channel impulse response in the sector A.sub.i and the l'-th component of the channel impulse response in the sector A.sub.i, and.sigma..sup.2.sub.h is the variance of the error in the estimation of the channel impulse response coefficients from the test signal.
	www.freepatentsonline.com /5615208.html (4758 words)

	Remote Channel Impulse Response Measurement System (Site not responding. Last check: 2007-10-13)
		Modeling of the impulse response has also been used for the simulation of the radio channel which, in turn, can determine the effects of the propagation channel on the signal itself.
		In addition, the impulse response, once determined, can be used to simulate the actual received signal as it is distorted through the propagation channel by convolving the impulse response with the transmitted signal.
		The impulse is produced by mixing (multiplying) a local copy of the PN code with the received signal and then integrating (summing) the output.
	flattop.its.bldrdoc.gov /rcirms (1408 words)

	Step, Impulse, and Other Responses
		Using the general time-domain response functions defined in this chapter, it is easy to investigate typical problems such as step, impulse, and ramp responses.
		The impulse responses for the first and second inputs are shown as a solid and a dashed line, respectively.
		This is the simulated (rather than computed symbolically) impulse response for the first input.
	documents.wolfram.com /applications/control/Time-DomainResponse/4.3.html (280 words)

	impulse (Control System Toolbox)
		The impulse response is the response to a Dirac input
		The left plot shows the impulse response of the first input channel, and the right plot shows the impulse response of the second input channel.
		To simulate this response, the system is discretized using zero-order hold on the inputs.
	www.tau.ac.il /cc/pages/docs/matlab/help/toolbox/control/impulse.html (375 words)

	impulse :: Functions (Control System Toolbox)
		The impulse response is the response to a Dirac input
		The impulse response of multi-input systems is the collection of impulse responses for each input channel.
		The left plot shows the impulse response of the first input channel, and the right plot shows the impulse response of the second input channel.
	www.mathworks.com /access/helpdesk/help/toolbox/control/ref/impulse.html (384 words)

	E12
		We used that fact to show that the impulse response is simply the derivative of the step response - this is probably the method you should use for the next week or two.
		Both the impulse response and the step response are zero-state responses (i.e., the initial conditions are equal to zero).
		Both are based on representing the input as a sum (or integral) of impulses, and representing the output as the sum (or integral) of the responses to the inputs.
	www.swarthmore.edu /NatSci/echeeve1/Class/e12/Lecture/L03/L3.html (824 words)

	ELEC 320: Laboratory Assignment 2 (Site not responding. Last check: 2007-10-13)
		Some notes on the continuous-time impulse function are attached, and we will demonstrate how to measure the impulse response of an RC circuit in lab.
		Simulations of this type are used to understand how an audio speaker or a listening room with a certain impulse response will affect the music that is heard in the room.
		The impulse response can be measured easily in practice in order to obtain a model for a listening room.
	www.eg.bucknell.edu /~kozick/elec320/lab2.html (596 words)

	Impulse Response
		Figure 3.4 plots the impulse response of the example filter, as computed by the matlab script shown in Fig.
		Linear, time-invariant filters are fully characterized by their response to this simple signal, as we will show in Chapter 4.
		The impulse response of this filter is also easy to compute by hand.
	ccrma-www.stanford.edu /~jos/laplace/Impulse_Response.html (153 words)

	SNL Seismic Impulse Response - Salvo (Site not responding. Last check: 2007-10-13)
		Above is the image generated by Salvo for a simple impulse response.
		The impulse response problem is very useful in testing absorbing boundary conditions (ABCs).
		2, the impulse response is shown with Clayton and Enquist's ABCs.
	www.cs.sandia.gov /~ccober/seismic/impulse.html (250 words)

	[music-dsp] creating an IIR filter from an impulse response.. . (Site not responding. Last check: 2007-10-13)
		Previous message: [music-dsp] creating an IIR filter from an impulse response..
		Next message: [music-dsp] creating an IIR filter from an impulse response...
		> > However, the impulse response tends towards zero, and depending on the > representation you use, there is a point where you cannot represent > infinitely small numbers; therefore you end up with a finite response.
	aulos.calarts.edu /pipermail/music-dsp/2004-March/026575.html (359 words)

	Impulse response (Site not responding. Last check: 2007-10-13)
		When measuring a single input-single output linear system, such as a loudspeaker, the impulse response is defined as the output signal resulting from a short pulse input signal.
		The impulse response completely describes a linear system, it is quite intuitive (e.g.
		Because of this and because a MLS measurement gives the impulse response as the result, the data from a MLS measurement is saved in time domain as an impulse response.
	www.winmls.com /hjelpfiler/impulseresponse.htm (113 words)

	Impulse response software downloads (Site not responding. Last check: 2007-10-13)
		Impulse Response of a room measurement, loudspeaker Frequency Response analysis.
		Response Mailer is an automated system that instantly emails information to your customers and prospects.
		Digital Indicators Package is a set of digital filters generated with the help of a special program and having a complex impulse response.
	www.free-download-soft.com /Impulse+response (582 words)

	Impulse Response (Site not responding. Last check: 2007-10-13)
		Define its impulse response to be the output when the input is the Kronecker delta function (an impulse).
		The impulse response of a continuous-time system is similarly defined to be the output when the input is the Dirac delta function.
		Since the impulse contains all frequencies in equal amounts, the impulse response represents the response to all frequencies.
	ptolemy.eecs.berkeley.edu /eecs20/week11/response.html (120 words)

	Introduction to Digital Filters - FIR (finite impulse resonse), IIR (infinite impulse response), low pass, high pass
		Simple filters are usually defined by their responses to the individual frequency components that constitute the input signal.
		A filter's response to different frequencies is characterized as passband, transition band, or stopband.
		The passband response is the filter's effect on frequency components that are passed through (mostly) unchanged.
	www.netrino.com /Publications/Glossary/Filters.php (1051 words)

	Voxengo Pristine Space VST Help
		Since the loaded impulse response file can be either a mono, a stereo or a multi-channel file, you have the option of choosing which impulse response file's channel (Chn) you wish to assign to this convolution channel.
		For the tonal balance of these impulse responses to be preserved, the pre-ringing must be included; the drawback is that the processed wet signal will play later than the unprocessed dry signal.
		When using an impulse response which starts with an initial spike and has no leading samples, the spike can be quickly aligned to the dry signal by moving the offset control fully anticlockwise so that the response is shifted by exactly 512 samples to the right.
	www.voxengo.com /doc/pspace (4791 words)

	Convolution Background
		Convolution can be used to calculate the response of a system to arbitrary inputs by using the impulse response of a system.
		The superposition theorem states that the response of the system to the string of impulses is just the sum of the response to the individual impulses.
		This equation merely states that the output is equal to the sum of the responses from the individual impulses.
	www.swarthmore.edu /NatSci/echeeve1/Ref/Convolution/Convolution.html (911 words)

	SoundStage! Insiders' Forum - Frequency Response and Room Acoustics (1/1999)
		An impulse response, when applied to audio, is the data recorded when a loudspeaker and/or room is excited with a very large amount of energy over a short period of time.
		In the time domain, this means that the impulse response would be transferred through a system under test and emerge as an impulse response identical with what went in.
		The room impulse response (Figure 2) is shown in Figure 4 after it is gated.
	www.soundstage.com /articles/insiders005.htm (1371 words)

	Finite Impulse Response (FIR) Filters
		Digital filters that have an impulse response which reaches zero in a finite number of steps are (appropriately enough) called Finite Impulse Response (FIR) filters.
		An FIR filter can be implemented non-recursively by convolving its impulse response (which is often used to define an FIR filter) with the time data sequence it is filtering.
		IDL's DIGITAL_FILTER function computes the impulse response of an FIR filter based on Kaiser's window, which in turn is based on the modified Bessel function.
	www.physics.nyu.edu /grierlab/idl_html_help/signal17.html (553 words)

	Simulation of Mobile Radio Channel Impulse Response Models (SMRCIM) (Site not responding. Last check: 2007-10-13)
		SMRCIM provides an inexpensive way to study or create channel responses, and can be used as a channel model to study bit error rates in frequency-flat and frequency-selective fading environments.
		Then, the user may specify a high resolution factor that synthesizes the amplitudes and phases of closely spaced impulse responses which yield strikingly accurate impulse responses and CW fading for outdoor communication channels.
		Simulation results such as complex impulse responses and CW fading, and important parameters such as topography, rms delay spread, path loss, and T-R separation are automatically stored on disk for further analysis.
	www.mprg.org /research/smrcim.shtml (646 words)

	Room Impulse Response
		The impulse response is displayed in the top axis, the amplitude response in the middle and the phase response in the bottom axis.
		This impulse response is defined only from one point at which a sound source is excited to another point at which a microphone is placed to measure the response to this excitation.
		Therefore to be able to calculate this response, the position of the source and receiver have to be defined.
	www.dspalgorithms.com /room/room25.html (1408 words)

	An Introduction To System Dynamics - Second Order Linear Systems (Site not responding. Last check: 2007-10-13)
		So, to compute the impulse response we compute the response of a system with no input (so we get the homogeneous response) but with a different initial condition determined by the impulse.
		Now, the question is "What does this have to do with the impulse response?" Earlier we noted that the effect of the impulse was to change the value of the derivative of the response immediately after the impulse occurred.
		As in the impulse response, there are two special cases for the step response.
	www.facstaff.bucknell.edu /mastascu/eControlHTML/SysDyn/SysDyn2.html (4052 words)

	Plotting Filter Step and Impulse Response - Fall 2001
		In the case of the impulse response, we need the response of the circuit to an impulse waveform at the input.
		Both of these responses can readily be obtained by placing a Pulse source at the input and then editing its parameters to produce either a step or an impulse waveform.
		The impulse waveform is so narrow it appears to be a vertical spike, but it actually is 1E9 high and 1ns wide.
	www.spectrum-soft.com /news/fall2001/stepimp.shtm (747 words)

	COGS501 -- Impulse Responses and Convolutional Systems
		Recall that an impulse (in the current context, anyhow) is a vector whose first element has the value 1 and all of whose subsequent elements are zero.
		When the impulse response is of infinite duration (as it perfectly well can be in a linear shift-invariant system!), then this slogan remains mathematically true, but is of less practical value (unless the impulse response can be truncated without significant effect).
		The goal of this section is to develop the basic material on impulse response and convolution in the style that is common in the digital signal processing literature in the discipline of Electrical Engineering, so as to help you become familiar with the type of notation that you are likely to encounter there.
	www.ling.upenn.edu /courses/Spring_2006/ling545/impulse_resp.html (3983 words)

	Convolution reverb \| How convolution works, how to make recordings suitable for use with convolution reverbs
		An impulse response (IR) is what results when you feed an impulse to some system (see the sidebar “Impulse Response Glossary” for a list of terms commonly associated with convolution).
		Impulse responses are surprisingly simple to record, but attention to detail is critical.
		Although you can record the impulse response of nearly anything, the assumption is that the IR is reverberant in nature.
	emusician.com /tutorials/emusic_acting_impulse (4483 words)

Try your search on: Qwika (all wikis)