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Qualitative assessment of sound insulation of building envelopes and development of an adapted noise annoyance construct applicable for building acoustics issues

Exposure to environmental noise in buildings results in several adverse impacts on inhabitants, of which annoyance is one of the primary causes for concern. To address the adverse impacts of environmental noise, adequate sound insulation is crucial. Currently, a variety of Single Number Quantifiers (SNQs) such as Rw, Rw + C, Rw + Ctr, Rw’, DnT,w, STC … are used to describe the sound insulation performance of sound insulation. However, these existing SNQs focus on reducing the overall indoor sound levels, rather than annoyance. This implies that if new building technologies and techniques for façades are intended to be developed, an appropriate applicable sound insulation descriptor system has to be established. Noise annoyance is a complex psychological concept that entails both psychophysical and cognitive aspects, and due to its complex nature, a thorough understanding of noise annoyance in buildings needs to be established on the road to achieving effective guidelines. Regarding sound insulation, literature has shown that differences in the Sound Reduction Spectra (SRS) of façade structures greatly affect the loudness perception. Furthermore, the frequency content and temporal structure of the stimuli also result in a difference in perception of the attenuation. A similar effect can be expected for annoyance and needs to be studied in more detail. These aspects will be investigated in a multi-sensorial perception lab with suitable experimental settings to arrive at an adapted noise annoyance construct applicable for building acoustics issues related to the attitudes towards the relevant noises. Based on this, a psychophysical single number quantity for characterizing the sound insulation properties of the facades will be proposed.

Date:1 Apr 2023 →  Today
Keywords:Building acoustics, Environmental noise, Noise annoyance
Disciplines:Construction acoustics and lighting
Project type:PhD project