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.

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
References in periodicals archive ?
Figure 6 shows Steps in the case of gray image in (a) the original fingerprint is shown, in (b) the noise reduction is carried out by means of a Lowpass filter (applied to (a) across the processing frequencies), in (c) the edge enhancement is carried out by applying a unidirectional gradient of (a), in (d) a binarization is carried out on the criterion of the magnitude of the unidirectional gradient, in (e) the slimming of the crests is carried out to obtain a pixel width.
Compact quasi-elliptic microstrip lowpass filtre with wide stopband, Electronics Letters 46(20): 1384-1385.
The bandpass filter comprises cascaded Frequency Devices Model 90PF H8B and Model 90PF L8B programmable eight-pole highpass and lowpass Butterworth filters.
The scaling filter is a lowpass filter, while the wavelet filter is a highpass filter.
With a user-friendly touch screen, the DSP allows audio professionals to mix channels, run time squeeze or compression algorithms, activate a limiter to prevent clipping or insert a lowpass filter to remove wind noise all powered by one TI DSP device.
So we present a general method to construct a lowpass matrix filter at first.
Programmable lowpass and bandpass filtering allows application configuration, lower RMS noise, and elimination of false alarms.
Two stock 70 MHz lowpass filters can be cascaded to provide a sharp discriminant, suitable for stabilizing the beat frequency at the center of a stock 70 MHz bandpass filter.
The surface EMG signals were rectified and enveloped with use of an 8 Hz, lowpass, fourth-order Butterworth filter (butter/filtfilt; MATLAB Command, The MathWorks).
The Mixers output In-Phase (I) and Quadrature-Phase (Q) signals, which are then lowpass filtered and gain controlled before they are digitally sampled.
5" midrange lowpass starts rolling off slowly at 200Hz, reaching -4dB at 60Hz and then descending to what I have defined as the minimum operating frequency of a driver (-20dB from passband level) at 30Hz.
Since jitter effectively acts as a lowpass filter [2], it can be removed via deconvolution.