On the use of geometric and harmonic means with the generalized cross-correlation in the time domain to improve noise source maps

Type de document

Études primaires

Année de publication

2016

Langue

Anglais

Titre de la revue

The Journal of the Acoustical Society of America

Première page

EL56

Dernière page

EL61

Résumé

Microphone array techniques are an efficient tool to detect acoustic source positions. The delay and sum beamforming is the standard method. In the time domain, the generalized cross-correlation can be used to compute the noise source map. This technique is based on the arithmetic mean of the spatial likelihood functions. In this study, the classical arithmetic mean is replaced by the more standard generalized mean. The noise source maps provide by the arithmetic, geometric and harmonic means are compared in the case of numerical and experimental data obtained in a reverberant room. The geometric and harmonic means provide the best noise source maps with no side lobes and a better source level estimation.

Mots-clés

Carte de bruits, Noise chart, Instrument de mesure, Measuring instrument, Propagation du son, Sound propagation, Description du matériel, Description of equipment, Évaluation du matériel, Evaluation of equipment, Lutte contre le bruit, Noise control, Préservation de l'ouïe, Hearing conservation, Mesure du bruit, Noise measurement, Microphone

Numéro de projet IRSST

2015-0075

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