Difference between revisions of "Dictionary:Filter/es"

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(Created page with "<b>2</b>. <b>Filtro linear</b> es llamado ''convolución'' (q.v.). Un filtro lineal puede caracterizarse por su respuesta al impu...")
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[[File:Segf8.jpg|center|thumb|600px|FIG. F-8. <b>Filtering types</b>.]]
 
[[File:Segf8.jpg|center|thumb|600px|FIG. F-8. <b>Filtering types</b>.]]
  
<b>2</b>. <b>Linear filtering</b> is called [[Special:MyLanguage/Dictionary:convolution|''convolution'']] (q.v.). A linear filter may be characterized by its impulse response or by its frequency-domain <b>transfer characteristics</b> (amplitude and phase response as a function of frequency).  
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<b>2</b>. <b>Filtro linear</b> es llamado [[Special:MyLanguage/Dictionary:convolution|''convolución'']] (q.v.). Un filtro lineal puede caracterizarse por su respuesta al impulso ó <b>transferencia de caracteristicas</b> en su dominio de frecuencia (amplitud y respuesta de fase en función de la frecuencia).  
  
 
<b>3</b>. [[Special:MyLanguage/Dictionary:alias_filter|''Alias filters'']] (q.v.) are very sharp high-cut filters designed to prevent aliasing.  
 
<b>3</b>. [[Special:MyLanguage/Dictionary:alias_filter|''Alias filters'']] (q.v.) are very sharp high-cut filters designed to prevent aliasing.  

Revision as of 09:37, 10 January 2019

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1. Una parte de un sistema que discrimina contra parte de la información que ingresa. La discriminación generalmente se basa en la frecuencia, aunque se pueden usar otras bases como longitud de onda, movimiento, coherencia ó amplitud. Ver FiguraF-8.

FIG. F-8. Filtering types.

2. Filtro linear es llamado convolución (q.v.). Un filtro lineal puede caracterizarse por su respuesta al impulso ó transferencia de caracteristicas en su dominio de frecuencia (amplitud y respuesta de fase en función de la frecuencia).

3. Alias filters (q.v.) are very sharp high-cut filters designed to prevent aliasing.

4. Band-pass filters are often specified by listing their low-cut and high-cut component filters. Filter characteristics are often specified by the frequencies at which the amplitude is down by 3 dB (70% or half power) and by the slope of the cutoff. Thus ‘‘14/18–56/36’’ specifies a band-pass filter with a low-cut down 3 dB at 14 Hz with an 18 dB/octave slope and a high-cut down 3 dB at 56 Hz with a 36 dB/octave slope. Typical seismic filter curves are shown in Figure F-9. See also high-cut filter (=low-pass filter) and low-cut filter (=high-pass filter). The order of the specification is sometimes reversed.

FIG. F-9. Filter curves for typical seismic amplifier.

5. Notch filters sharply reject a very narrow band of frequencies.

6. Digital filters permit filtering in accord with arbitrarily chosen characteristics that might prove difficult or impossible to achieve with physical circuit components. Filtering can be accomplished by optical methods as well as by electrical and digital methods.

7. Specific types of filters used commonly include the Butterworth filter (q.v.), a band-pass filter design with flat response, and the Chebychev filter (Tchebyscheff filter), a band-pass filter with a steep rolloff, characterized by a uniform ripple in the pass band. 8. See also inverse filter [1]. Stacking is a filtering process.

9. To remove solids from a suspension by passage through a sieve.


References

  1. Sheriff, R. E; Geldart, L. P (August 1995). Exploration Seismology, 2nd Ed. Cambridge Univ. Press. p. 284, 292, 550. ISBN 9780521468268.


External links

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