Search results for "Anechoic chamber"

showing 3 items of 3 documents

Strumento virtuale in ambiente LabVIEW per la gestione automatica di misure di emissione radiata in camera semianecoica

2010

Electromagnetic Compatibility Semi-Anechoic Chamber Radiated EmissionsSettore ING-INF/07 - Misure Elettriche E Elettroniche
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Efficient Low-Frequency Modal Analysis of Anechoic Chamber

2007

An efficient method to analyze the electromagnetic field inside rectangular anechoic and semianechoic chambers from 30 to 100 MHz is shown. A modal expansion is employed to develop the homogeneous and the inhomogeneous field. This is combined with circuital techniques to compute the effect of the layers of ferrite and dielectrics in the walls of the chamber. Several numerical results of the Free Space Transmission Loss (FSTL) of an anechoic chamber and the Normalized Site Attenuation (NSA) of a semianechoic chamber are provided.

Electromagnetic fieldEngineeringAnechoic chamberPhysics::Instrumentation and Detectorsbusiness.industryAttenuationModal analysisAcousticsTransmission lossDielectricLow frequencyPhysics::Classical PhysicsFerrite (magnet)business2007 IEEE International Symposium on Electromagnetic Compatibility
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Microphones’ Directivity for the Localization of Sound Sources

2011

In a recent paper [P. Rizzo, G. Bordoni, A. Marzani, and J. Vipperman, "Localization of Sound Sources by Means of Unidirectional Microphones, Meas. Sci. Tech., 20, 055202 (12pp), 2009] the proof-of-concept of an approach for the localization of acoustic sources was presented. The method relies on the use of unidirectional microphones and amplitude-based signals' features to extract information about the direction of the incoming sound. By intersecting the directions identified by a pair of microphones, the position of the emitting source can be identified. In this paper we expand the work presented previously by assessing the effectiveness of the approach for the localization of an acoustic…

Sound localizationunidirectional microphonesound source localization; unidirectional microphones; polar directivity pattern; feature extraction; timedelay estimate.timedelay estimate.Anechoic chamberComputer scienceAcousticsfeature extractionFeature extractionDetectorpolar directivity patternAcoustic source localizationDirectivityExpression (mathematics)sound source localizationPosition (vector)
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