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Airborne Sound Insulation of Sustainable Building Facades

In: iCity. Transformative Research for the Livable, Intelligent, and Sustainable City

Author

Listed:
  • Andreas Drechsler

    (Hochschule für Technik Stuttgart)

  • Steffi Reinhold

    (Hochschule für Technik Stuttgart)

  • Andreas Ruff

    (Hochschule für Technik Stuttgart)

  • Martin Schneider

    (Hochschule für Technik Stuttgart)

  • Berndt Zeitler

    (Institute for Applied Research, University of Applied Sciences Stuttgart)

Abstract

Two trends are currently leading to an increased risk of indoor noise pollution. Firstly, urban densification causes traffic noise sources to be closer to the building facades which makes them louder at the facades. Secondly, airtightness of buildings, due to energy regulations, leads to the need of natural or mechanical ventilation to ensure a “healthy” indoor air quality, thereby allowing noise to easily pass from outdoors to indoors. In the case of mechanical ventilation, an additional noise source is also created. This study investigates the risk reduction of an indoor noise problem by optimizing the facade elements regarding sound insulation. Noise levels of different transportation noise sources (cars, trucks, trains) are used to calculate the resulting indoor noise levels after passing through the facade elements. The amount of noise transmitted into the indoors is dependent on the frequency spectra of the sources and of the sound reduction properties of the facade elements. Facade elements such as masonry walls, open windows, and ventilators are investigated and modified regarding their sound insulation properties. Through passive means, the weighted sound reduction index of an open window and an open ventilator was increased by 12 dB and 3 dB, respectively. Also, the indoor self-noise of the ventilator was investigated and reduced for different airflow rates.

Suggested Citation

  • Andreas Drechsler & Steffi Reinhold & Andreas Ruff & Martin Schneider & Berndt Zeitler, 2022. "Airborne Sound Insulation of Sustainable Building Facades," Springer Books, in: Volker Coors & Dirk Pietruschka & Berndt Zeitler (ed.), iCity. Transformative Research for the Livable, Intelligent, and Sustainable City, chapter 22, pages 335-357, Springer.
    • Handle: RePEc:spr:sprchp:978-3-030-92096-8_22
    DOI: 10.1007/978-3-030-92096-8_22
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