The repeatability and reproducibility of laboratory building acoustic measurements: Numerical study

Dijckmans, Arne; Geetere, Lieven De; Ingelaere, Bart

doi:10.1121/2.0000530

Cited by 1 publication

(1 citation statement)

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“…Simulations carried out with a wave based model (WBM) confirm that the variations in geometry are the most important factor limiting the reproducibility at low frequencies. In the WBM simulations, five different test facilities, as described in [10], were modelled, using two random source positions. Variations due to the measurement procedure are eliminated in the model by using the exact spatial average of the sound pressure levels in the rooms and the exact reverberation times.…”

Section: Parameters Influencing Reproducibilitymentioning

confidence: 99%

European Round Robin Test for the Airborne Sound Insulation of a Steel Plate

Dijckmans,

De Geetere

2022

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

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To measure the airborne sound insulation of glazing in accordance with Annex D of ISO 10140-1, laboratories must verify their procedure by measuring reference insulating glass units (IGUs) annually. However, it has proved difficult to reproduce the reference IGUs used in the original round robin. A more stable reference sample that can be easily obtained and stored could solve this problem. Within the WG Acoustics of ENBRI (European Network of Building Research Institutes), the use of a steel plate as a reference sample was proposed. This paper presents the result of a round robin test organized by ENBRI with 7 participating laboratories. Each laboratory performed 7 tests on a 2 mm thick steel plate, fixed to a wooden frame according to clear specifications. Both repeatability and reproducibility standard deviations were overall lower than ISO 12999-1 values. To check the repeatability of the installation in the small test opening, the sample and frame was remounted twice in each laboratory. The mounting affects the repeatability especially at higher frequencies, indicating that careful mounting is necessary to avoid leakage around the perimeter.

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Section: Parameters Influencing Reproducibilitymentioning

confidence: 99%