Identification of noise sources using a time domain beamforming on pneumatic, gas and electric nail guns

Type de document

Études primaires

Année de publication

2019

Langue

Anglais

Titre de la revue

Noise Control Engineering Journal

Première page

11

Dernière page

22

Résumé

In the construction industry, many workers are exposed daily to harmful levels of impulsive noise from nail guns. Therefore, a better knowledge of the noise generated by these tools is required in order to propose noise reduction solutions. The objective of this work is to propose an approach for source identification using a microphone array together with a source identification algorithm based on recent development in the generalized cross-correlation technique. In addition to the pneumatic nail gun, for which sources have been partially identified in the literature, the proposed approach is applied to two other types of nail guns, an electric and a gas powered one. First, the standardized acoustic power spectrum of these three nail guns is measured for global comparison purposes and result in a ranking of the three nail guns. Second, the generalized cross-correlation technique applied to nail gun noise source identification is presented. Third, acoustic maps for successive small time segments are presented, providing a fine identification of noise sources for the three nail guns and an explanation of the observed sound power level ranking.

Mots-clés

Clouage, Nailing, Mesure du bruit et des vibrations, Noise and vibration measurement, Évaluation de l'exposition, Exposure evaluation, Outil pneumatique, Pneumatic tool, Vibration, Lutte contre le bruit et les vibration, Noise and vibration control, Bruit impulsif, Impulse noise, Préservation de l'ouïe, Hearing conservation, Méthodologie, Methodology, Test d'exposition, Exposure test

Numéro de projet IRSST

0099-6580

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