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Tuning acoustical facade designs aiming for a controlled influence on the urban soundscape

Krimm, Jochen and Techen, Holger and Knaack, Ulrich (2016):
Tuning acoustical facade designs aiming for a controlled influence on the urban soundscape.
In: 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, Hamburg, Germany, 21/08/16 → 24/08/16, [Online-Edition: http://pub.dega-akustik.de/IN2016/data/index.html],
[Conference or Workshop Item]

Abstract

The representative high-rise facades of today's major cities are composing urban spaces out of glass and steel. With the reflection of one noise source on one hard reflective facade the noise level in an urban space can increase up to 3 dB. In the case of multiple reflections in a complex urban setting the level can increase up to 8 dB. Taking this effect into account, the surfaces of inner city facades have to be redesigned aiming for absorption of the sound energy. Due to the different functions of a façade, e.g. vista, light, energy and air, the complete covering of a facade in order to gain broadband absorption is not feasible. If the targeted broadband absorption is not feasible, the absorption effect can be tuned to several frequency bands in order to transform the uncomfortable noise perception into a comfortable one. During this research facade designs were developed with a focus on the acoustical effectiveness. It was demonstrated, that with a tunable acoustical facade construction, more than one frequency band can be influenced, thus achieving a comfort soundscape in an urban space.

Item Type: Conference or Workshop Item
Erschienen: 2016
Creators: Krimm, Jochen and Techen, Holger and Knaack, Ulrich
Title: Tuning acoustical facade designs aiming for a controlled influence on the urban soundscape
Language: English
Abstract:

The representative high-rise facades of today's major cities are composing urban spaces out of glass and steel. With the reflection of one noise source on one hard reflective facade the noise level in an urban space can increase up to 3 dB. In the case of multiple reflections in a complex urban setting the level can increase up to 8 dB. Taking this effect into account, the surfaces of inner city facades have to be redesigned aiming for absorption of the sound energy. Due to the different functions of a façade, e.g. vista, light, energy and air, the complete covering of a facade in order to gain broadband absorption is not feasible. If the targeted broadband absorption is not feasible, the absorption effect can be tuned to several frequency bands in order to transform the uncomfortable noise perception into a comfortable one. During this research facade designs were developed with a focus on the acoustical effectiveness. It was demonstrated, that with a tunable acoustical facade construction, more than one frequency band can be influenced, thus achieving a comfort soundscape in an urban space.

Divisions: 13 Department of Civil and Environmental Engineering Sciences
13 Department of Civil and Environmental Engineering Sciences > Institute für Structural Mechanics and Design
13 Department of Civil and Environmental Engineering Sciences > Institute für Structural Mechanics and Design > Facade Structures
13 Department of Civil and Environmental Engineering Sciences > Institute für Structural Mechanics and Design > Structural Engineering and Dynamics of Structures
13 Department of Civil and Environmental Engineering Sciences > Institute für Structural Mechanics and Design > Structural Engineering
Event Title: 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future
Event Location: Hamburg, Germany
Event Dates: 21/08/16 → 24/08/16
Date Deposited: 03 Jul 2018 09:22
Official URL: http://pub.dega-akustik.de/IN2016/data/index.html
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