Evaluation of the impact acoustic performance of horizontal barrier systems in laboratory
DOI:
https://doi.org/10.46421/entac.v20i1.6366Keywords:
Acoustic performance of buildings., Impact noise., Acoustic measurements., Laboratory tests.Abstract
Acoustic comfort in buildings depends on good insulation against airborne and impact noise. With the increasing use of lightweight materials in construction, noise problems can worsen, making acoustic insulation more challenging. This article presents part of a broader study on impact acoustic insulation for three floor system configurations in a laboratory setting. Measurements of residual noise, reverberation time, and impact noise were conducted according to ABNT NBR ISO 16283-2:2021, 717-2:2021, and 3382-2:2017 standards to determine the standard weighted impact sound pressure level (L’nT,w) of each system. The study evaluated three distinct systems: the first comprised a 100 mm thick concrete slab (S1); the second, a slab with a 40 mm thick screed (S2); and the third, a slab with a screed and a 5 mm thick mat (S3). The results show that System S1 had an L’nT,w level of 80 dB, which is 6 dB higher than that recorded for System S2 and 16 dB higher than System S3, highlighting the effectiveness of using mats to improve the acoustic performance of floor systems.
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