Measurement of sound diffusion coefficients of scattering furnishing volumes present in workplaces
Year: 2012
Type: conference-paper
Abstract: Scattering furniture (desks, chairs, cupboards, ) are often present in workplaces. Predictive software tools like Ray+ for mapping the acoustic pressure field in workplaces employ acoustic characteristics such as the absorption or diffusion of scattering wall facings or furnishing volume. In this work, we used a measurement system for determining the in situ sound diffusion coefficient of scattering furniture. The measurement technic is based on Vorländer and Mommertz method originally operating in free-field conditions. In order to overcome problems of parasite echoes coming from reverberation of the other inner-walls of the building and from noisy sources present on the site, we used a dedicated emission/reception system. An acoustic array using multipolar weighting allows spatial filtering of the parasite echo and an impulsive sound source enables the use of a broad temporal window, resulting in adequate time separation of the different signals received by the antenna. Measurements of sound diffusion coefficient of a desk, chairs, one or several seated persons, cupboards, panels containing one or several cavities, etc, have been carried out for several incidence angles. These measures allow constituting a first database of sound diffusion coefficients per octave of scattering furniture in workplaces.
Source: HAL
Institution: Institut National de Recherche et de Sécurité
Language: English
Subfield: Acoustics and Ultrasonics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4298458490