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Sökning: WFRF:(Michael Vorlander)

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1.
  • Arvidsson, Emma, et al. (författare)
  • Pattern and orientation of diffusers in rooms with an absorbent ceiling
  • 2019
  • Ingår i: Proceedings of the 23rd International Congress on Acoustics : Integrating 4th EAA Euroregio 2019 - Integrating 4th EAA Euroregio 2019. - 2226-7808 .- 2415-1599. - 9783939296157 ; 2019-September, s. 2281-2288
  • Konferensbidrag (refereegranskat)abstract
    • Lately have the demands on good room acoustics in public ordinary rooms increased. Traditionally has only reverberation time been considered in this type of rooms but complementary parameters as sound strength and speech clarity are more commonly used today. This trend naturally implies higher demands on the acoustic treatment. Typical for public ordinary rooms is to use an absorbent ceiling. One way to further improve the acoustic properties is to complement the ceiling treatment with diffusers. To investigate the effect of combining these two types of acoustic treatments have measurements been carried out combing different setups of diffusers in a reverberant room with an absorbent ceiling. The impact on reverberation time, speech clarity and sound strength has been studied. In this paper we present how diffusers can be used in order to improve the acoustic properties in a public ordinary room with an absorbent ceiling and how the pattern and orientation of diffusers can be used to adjust different acoustic parameters.
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2.
  • Vardaxis, Nikolaos Georgios, et al. (författare)
  • Acoustic comfort assessment in heavyweight residential buildings : Acoustic data associated to subjective responses
  • 2019
  • Ingår i: Proceedings of the 23rd International Congress on Acoustics : Integrating 4th EAA Euroregio 2019 - Integrating 4th EAA Euroregio 2019. - 2226-7808 .- 2415-1599. - 9783939296157 ; 2019-September, s. 836-843
  • Konferensbidrag (refereegranskat)abstract
    • This article presents a study aiming to explore and evaluate acoustic comfort in residential multistory buildings in Sweden. Acoustic data was associated to self-reported responses acquired by a survey: a questionnaire was setup researching the response to noise annoyance from multiple sources in a flat and the emotional reactions of tenants to the acoustic climate at home. An assessment of acoustic comfort in the test apartments was performed utilizing the circumplex model of affect. A sample of 353 residents offered their ratings on 12 bipolar scales regarding their feelings towards their living sound environment. Two dimensions were identified: pleasantness and activation. Statistical models were developed using acoustic and structural variables. L'#$,&,'((predicted best pleasantness and number of flats per building predicted best activation. A new acoustic comfort indicator is suggested based on the pleasantness model and four novel acoustic comfort classes are proposed as: AC-1: Very good, AC-2: Good, AC-3: Acceptable, AC-4: No comfort.
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  • Resultat 1-2 av 2
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konferensbidrag (2)
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refereegranskat (2)
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Bard, Delphine (2)
Ochmann, Martin (2)
Michael, Vorlander (2)
Fels, Janina (2)
Arvidsson, Emma (1)
Nilsson, Erling (1)
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Karlsson, Ola (1)
Vardaxis, Nikolaos G ... (1)
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Lunds universitet (2)
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Engelska (2)
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2019 (2)

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