Conveners
A03.04 Acoustics of wooden buildings: S016
- Jean-Luc Kouyoumji (FCBA Institute of Technology)
- Heinz Ferk
A03.04 Acoustics of wooden buildings: S393
- Heinz Ferk
- Jean-Luc Kouyoumji (FCBA Institute of Technology)
A03.04 Acoustics of wooden buildings: S394
- Jean-Luc Kouyoumji (FCBA Institute of Technology)
- Heinz Ferk
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Christian Lux (Holzforschung Austria)11/09/2026, 08:40A03 Building Acoustics
Elastically bound granular chippings are widely used in cross-laminated timber (CLT) floor constructions to improve the impact sound insulation of the construction. Although laboratory measurements often demonstrate very low normalized impact sound pressure levels for such systems, significant variability has been observed in practice. In the present study the impact sound pressure...
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Alexander Stenitzer (Holzforschung Austria)11/09/2026, 09:00A03 Building Acoustics
Elastically bound granular chippings are widely used in cross-laminated timber (CLT) floor constructions to improve the impact sound insulation of the construction. Although laboratory measurements often demonstrate very low normalized impact sound pressure levels for such systems, significant variability has been observed in practice. Previous research [1, 2] also supports the assumption that...
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Leonardo Luison (ISOLGOMMA SRL)11/09/2026, 09:20A03 Building Acoustics
Sound insulation in timber construction remains a major challenge to the wider adoption of lightweight building systems, particularly Cross-Laminated Timber (CLT) floors. This paper presents the results of a recent laboratory measurement cam-paign focused on the acoustic performance of floating floor systems incorporating resilient materials installed under screed on CLT slabs. Measurements...
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Bart Van de Velde (SonIQ)11/09/2026, 09:40A03 Building Acoustics
Engineering offices and manufacturers of acoustic building systems or materials often rely on measurement data to determine the adequacy of solutions for specific situations. This typically involves numerous costly and time-consuming laboratory measurements, making it difficult to efficiently explore and optimize various design configurations.In this paper, a method for predicting the sound...
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Vincenzo Pettoni Possenti (Department of Industrial Engineering, University of Bologna)11/09/2026, 10:20A03 Building Acoustics
ISO 10848โ1 provides a wellโestablished methodology for characterising the vibration reduction index Kij of building junctions. However, its current version does not include specific guidance for configurations involving resilient interlayers, which are commonly used in Cross Laminated Timber (CLT) constructions. This raises the question of how to apply ISO 10848โ1 reliably when a resilient...
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Paulo Pinto (CDM Stravitec)11/09/2026, 10:40A03 Building Acoustics
The adoption of cross-laminated timber (CLT) is hindered by its poor acoustic performance. A critical factor is flanking sound, where vibrational energy is transmitted between two building components across a common junction. Resilient strips or pads can be added at the junction to decouple these components and reduce flanking sound. While effective, the performance of these solutions depends...
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Vincenzo Pettoni Possenti (Department of Industrial Engineering, University of Bologna)11/09/2026, 11:00A03 Building Acoustics
Cross-laminated timber (CLT) is widely appreciated for its fast installation, sustainability, and lightweight properties. However, its high sound radiation efficiency makes it particularly susceptible to flanking transmission. At the same time, its aesthetic appeal often leads architects to leave surfaces exposed, avoiding additional linings.In standard design solutions, suspended ceilings are...
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Stefan Schoenwald (Empa)11/09/2026, 11:20A03 Building Acoustics
This paper presents an overview of the results from a multiโyear collaborative research project investigating structureโborne sound transmission across floorโwall junctions in typical Swiss multistory residential buildings. The study focuses on experimentally characterizing flanking transmission paths that significantly influence airborne and impact sound insulation in lightweight and hybrid...
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Jean-Luc Kouyoumji (FCBA Institute of Technology)11/09/2026, 11:40A03 Building Acoustics
In 2023, 4 types of junctions were measured in an in-situ measurement mockup: the โMaquette Acoustique Boisโ. The mockup is a three floors CLT based building, with four rooms on each level. The measurement strategy is Statistical Energy Analysis (SEA). In a previous paper the mockup was used to measure vibration reductions levels indexes Kij, in different configurations, where smart building...
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Edwin P.B. Reynders (KU Leuven, Department of Civil Engineering)11/09/2026, 14:20A03 Building Acoustics
Cross-laminated timber (CLT) panels are gaining popularity as load-bearing wall and floor elements due to their low surface mass, potential for sustainable sourcing, and speed of installation on site. However, accurately and efficiently predicting their airborne and impact sound insulation remains challenging. This difficulty arises from their complex vibroacoustic behavior, driven by strongly...
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Antonio Esposito (Empa)11/09/2026, 14:40A03 Building Acoustics
Existing numerical models reliably predict flanking sound transmission in cross-laminated timber (CLT) junctions when the stiffness of the connection approaches either the ideally rigid condition or that of an elastic layer interposed between plates. Nevertheless, it is still challenging to deterministically define coupling stiffness values for modelling the direct mechanical contact at the...
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Catherine Guigou-Carter (CSTB)11/09/2026, 15:00A03 Building Acoustics
The building sector is confronted with two key challenges: minimizing the environmental impacts while ensuring occupants well-being. In this context, the use of sustainable materials with high thermal and acoustical performances appears as a necessity. Therefore, raw earth appears as strategic low-carbon material, as it is naturally abundant, locally available and renewable. It also offers...
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Bernd Nusser (Holzforschung Austria)11/09/2026, 15:20A03 Building Acoustics
Laboratory measurements in accordance with EN ISO 10140-5:2021 are used to analyse the rain sound insulation of timber roof constructions with varying structural configurations. Rain induced sound intensity levels are examined for exposed-rafter roofs and timber frame roofs with aluminium sheet, zinc sheet, and two types of tile cladding (sliding tiles and beaver-tail tiles). The influence of...
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