Results 221 to 230 of about 2,710,294 (299)

Nonlinear passive acoustic filtering

The Journal of the Acoustical Society of America, 1988
in an ear muff intended for protection against excessive noise exposure, the passive means (8) according to this invention automatically and continuously varies the amount of reduction provided for the sound arriving at the ear of the wearer; it retains substantially unaltered the performance of the ear muff for high sound levels, but effects a ...
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Matrix filters for passive sonar

2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221), 2002
This paper introduces matrix filters as a tool for localization and detection problems in passive sonar. The outputs of an array of sensors, at some given frequency, can be represented by a vector of complex numbers. A linear filtering operation on the sensor outputs can be expressed as the multiplication of a matrix (called a matrix filter) times this
Vaccaro, Richard J., Harrison, Brian F.
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Research on Active Filters and Passive Filters

Science and Technology of Engineering, Chemistry and Environmental Protection
Active filters have been a cornerstone of electronic engineering since their inception in the mid-20th century. As technology has advanced, these components have become increasingly sophisticated and integral to a wide range of applications, from audio equipment to telecommunications. This article introduces two types of active filters, active low-pass
Haoyu Wang, Haoran Zhang
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Passive Harmonic Filter Design Scheme

IEEE Industry Applications Magazine, 2011
In this article, a passive harmonic filter design scheme is proposed for offshore power distribution systems with subsea cables. Such an offshore system requires more reliable harmonic filters due to parallel resonance and the resultant large harmonic distortions in the system caused by subsea cables.
null Xiaodong Liang, O. Ilochonwu
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Passive Filter Circuit Design

1991
It would be misleading to suggest, with the advent of operational amplifiers and digital synthesis techniques, that passive filters have no role to perform in modern circuit applications.
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Passive Integrated RF Filters

1999
The practical application of RF integration in the front end of cellular telephones is discussed. The varying requirements of an integration technology are identified based on generic system architectures and examples of commercially available integrated components are given.
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Passive Filters—Potentialities and Limitations

IEEE Transactions on Industry Applications, 2004
New topologies for harmonic mitigation and active filters have come a long way, and these address the line-harmonic control at the source. These mitigate some of the disadvantages of passive filters, however, for nonlinear loads above 1 MW the passive filters are an economical choice.
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Passive cascaded lattice digital filters

ICASSP '79. IEEE International Conference on Acoustics, Speech, and Signal Processing, 1980
Energy relations are developed for the analysis of cascaded two pair lattice digital filters, where the individual sections are passive. Conditions of the passivity are shown in the form of inequalities containing parameters of the section, which are described as linear four-pole networks.
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Voltage harmonic reduction using passive filter shunt passive-active filters for non-linear load

International Conference on Communication Systems and Network Technologies, 2017
Rajeshwari, A. Bagwari
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Active simulation of passive filters

1996
In addition to the methods presented in Chapter 11 for realizing high-order active filters, there is another entirely different approach to the same end. This other approach is to take a passive filter and simulate it by means of active devices and circuits. We shall devote this chapter to techniques in and examples of this approach.
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