On the influence of the air flow resistivity on the measurement of the dynamic stiffness of underlays for floating floors
| Autor: | Martin Schmelzer, Heinrich Bietz, Spyros Brezas, Volker Wittstock |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Acoustics and Ultrasonics
Airflow QC221-246 Edge (geometry) 01 natural sciences airflow resistivity Speech and Hearing underlays for floating floors Electrical resistivity and conductivity 0103 physical sciences Electrical and Electronic Engineering Underlay dynamic stiffness measurement 010301 acoustics 010302 applied physics Acoustics in engineering. Acoustical engineering business.industry Acoustics. Sound Structural engineering Computer Science Applications Noise TA365-367 Floating floor Current (fluid) Reduction (mathematics) business Geology |
| Zdroj: | Acta Acustica, Vol 5, p 13 (2021) |
| ISSN: | 2681-4617 |
| DOI: | 10.1051/aacus/2021004 |
| Popis: | The dynamic stiffness of underlays is a required quantity to predict the reduction of impact and airborne noise transmitted through floating floors. The measurement of the dynamic stiffness is standardized in ISO 9052–1 using a floating floor section of 200 mm edge length. If open pore insulating materials are used for the underlay, the air flow and its flow resistivity have a significant impact on the dynamic stiffness. The standard ISO 9052–1 therefore calculates the dynamic stiffness based on three distinct intervals of the flow resistivity. This contribution analyses and discusses the mathematical origin and practical consequences of these three standardized intervals and proposes an improvement for a revision of the standard. The current physical model is expanded to examine if the results, that are gained from the geometrically reduced systems of the standard, can be transferred to room sized systems. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|