low-pass filter

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low-·pass fil·ter

a device or material with the opposite effect from a high-pass filter; most tissues act as low-pass filters of ultrasound signals.
Farlex Partner Medical Dictionary © Farlex 2012

low-pass filter

A filter that removes high-frequency waves from a sample, allowing only those below a specified frequency to pass.
See also: filter
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
The transfer function of the approximated fractional Butterworth low-pass filter of order (1 + [beta]) is given by [20]
Itoh, "A design of the low-pass filter using the novel microstrip defected ground structure," IEEE Transactions on Microwave Theory and Techniques, vol.
However, the virtual control input is sent to first-order low-pass filters, getting a new variable and its derivative.
To simplify these calculations, low-pass filters are supposed to be ideal and thus all filtered out harmonics will not be present in filtered signals.
Thirdly, a novel low-pass filter consisting of two improved DSCMRC connected in series is designed, simulated and measured in Section 4, which presents compact circuit size and excellent out-of -band rejection characteristics.
The frequency response of the resonator achieves a low-pass filter. The comparison of simulated and measured S-parameters of the simple meandered-slot resonator and the proposed low-pass filter is shown in Figure 15.
Here, we restrict ourselves to discussing the context of the basic low-pass filter defined on the entire real line, because once this is constructed, a wide variety of related filters and computational tools can be obtained.
The design tasks posed in our three experiments increased in difficulty, starting first with a low-pass filter found in an electronic stethoscope design.
The perceived elevation of signals presented from each elevation position in front of and behind the head are plotted as a function of low-pass filter cutoff frequency for each participant in Figure 1.
Control of bandstop response of Hi-Lo microstrip low-pass filter using slot in ground plane.
Low-pass filters with defected ground structure (DGS) [10-15] have been received increased attention in recent years for their unique features such as sharp cut-off frequency response, compact size and good performance in both the pass band and the stop band.
As is normal for communications-system simulations, the desired generated QPSK signal was centered at DC, and low-pass filters were used.
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