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Conference_programme: 10.4 - Noise indicators for impact assessment

Lecture: Maximum-level as an additional criterion for the assessment of railway noise at night: Definition of sleep quality and derivation of a protection criterion based on reported sleep disturbances for standards and regulations

Author(s): Schreckenberg Dirk, Belke Christin, Benz Sarah, Möhler Ulrich, Müller Uwe, Liepert Manfred

In German regulations on railway noise the average sound level LpAeq for day and night-time is the standard rating level to assess the railway noise impact. On behalf of the Hessian Environmental Department an expert report was prepared including re-analyses of existing data on noise effects on health and case studies in order to develop a suggestion for the implementation of a maximum sound level criterion for the impact assessment of railway noise at night-time. \nIn this contribution criteria of sleep quality and the impact of noise on sleep at night-time are discussed and physiologically measured indicators as well as indicators assessed in socio-acoustical surveys are presented with which an evaluation of maximum sound level criteria for the impact assessment of nocturnal railway noise has been done. Furthermore, in this contribution results on the relationship between reported sleep disturbances, average sound level at night-time, highest maximum sound level of all train types and number of trains are presented. For this, survey data on the effects of railway noise in the Rhine-Main Region in Germany assessed within the NORAH study on Noise-Related Annoyance, Cognition, and Health have been re-analysed. \nIn a second Euronoise contribution presented by Müller et al. exposure-response relations of railway noise-induced additional awakenings, the physiological criterion, will be shown. In a third contribution, Möhler et al. present the acoustical sound indicators for describing the maximum sound exposure and suggest a combined protection concept for residents affected by nocturnal railway noise based on maximum sound level criteria.

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Corresponding author

Name: Mr Dirk Schreckenberg

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Country: Germany