General ventilation filters: what acoustic characteristics?

Résumé et principaux résultats

Internoise 25-29 August 2024 - Nantes, FRANCE

Air filters are widely used in general ventilation, and introduced in ventilation ductworks, or air-handling units. They can have an impact on the noise path by attenuation or regeneration. However, their characteristics of sound attenuation and sound regeneration are usually not known, nor used or determined. In this study, 15 filters representing four different types of air filters commercially available have been tested in laboratory, to characterize the insertion loss and the noise regeneration. In addition, the effect of the dust loading has been investigated on the sound characteristics as well as the influence of a series installation of a prefilter and a fine filter installed downstream of it. These experimental data will be helpful for acoustic studies of ventilation networks. Some results about sound absorption can be related to the characteristics of the filters, thickness or shape, but also to the dust loading and the use in series.

Thème

Ventilation et qualité de l'air

Mots-clés

Acoustique, Filtres, Ventilation

Auteurs

BESSAC François, GINESTET Alain