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Sökning: WFRF:(Lercher Peter) > Stockholms universitet

  • Resultat 1-2 av 2
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  • Botteldooren, Dick, et al. (författare)
  • An LAeq is not an LAeq.
  • 2005
  • Ingår i: Journal of the Acoustical Society of America. - 0001-4966. ; 117:4, s. 2616
  • Tidskriftsartikel (övrigt vetenskapligt)abstract
    • Classical dose response relationships for environmental noise annoyance have been based on Ldn or Lden. These exposure measures are essentially based on an energy averaging measure, LAeq. Differences between groups of sources (e.g., continuous or event based) are accounted for by using separate dose-effect relationships. In society today, one often sees that event loudness is traded for number of events which is perfectly acceptable within the LAeq based annoyance concept. Clearly a more unified theory for noise annoyance is needed to fully account for the effect of such trade-offs. In this paper a model implementing such a theory is presented. The perceptual model starts from the premises that a sound event has to be noticed for it to contribute to overall annoyance. The model accounts for the fact that noticing a noise event not only depends on the level of the event itself but also on background noise, sound insulation and acoustic characteristics of the dwelling, level of attention, etc. The severity of the effect of a noticed sound on overall annoyance is assumed to primarily depend on the signal to noise ratio. The model allows to account for modifiers such as previous exposure, noise sensitivity, and coping. The model results are compared to the findings of a recent field experiment. Conclusions based on calculated and experimental trends are presented.
  • De Coensel, Bert, et al. (författare)
  • A model for the perception of environmental sound based on notice-events
  • 2009
  • Ingår i: Journal of the Acoustical Society of America. - Acoustical Society of America. - 0001-4966. ; 126:2, s. 656-665
  • Tidskriftsartikel (refereegranskat)abstract
    • An approach is proposed to shed light on the mechanisms underlyinghuman perception of environmental sound that intrudes in everyday living. Most research on exposure-effect relationships aims at relating overall effects to overall exposure indicators in an epidemiological fashion, without including available knowledge on the possible underlying mechanisms. Here, it is proposed to start from available knowledge on audition and perception to construct a computational framework for the effect of environmental sound on individuals. Obviously, at the individual level additional mechanisms(inter-sensory, attentional, cognitive, emotional) play a role in the perception of environmental sound. As a first step, current knowledge is made explicit by building a model mimicking some aspects of human auditory perception. This model is grounded in the hypothesis that long-term perception of environmental sound is determined primarily by short notice-events. The applicability of the notice-event model is illustrated by simulating a synthetic population exposed to typical Flemish environmental noise. From these simulation results, it is demonstrated that the notice-event model is able to mimic the differences between the annoyance caused by road traffic noise exposure and railway traffic noise exposure that are also observed empirically in other studies and thus could provide an explanation for these differences.
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  • Resultat 1-2 av 2
Typ av publikation
tidskriftsartikel (2)
Typ av innehåll
refereegranskat (1)
övrigt vetenskapligt (1)
Berglund, Birgitta, (2)
Botteldooren, Dick (2)
De Muer, Tom (2)
De Coensel, Bert (2)
Lercher, Peter (2)
Nilsson, Mats E., (1)
Karolinska Institutet (1)
Engelska (2)


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