Abstract

Noise annoyance is a growing global problem. Quantification of the burden of disease from noise exposure lists noise annoyance as the most prominent health impact from noise exposure together with sleep disturbances. Road traffic is a pervasive noise source often accounting for more than 70% of a country's noise annoyance problems. For all major noise sources, well-developed relationships have been established between noise exposure and the degree of population annoyance. However, newer research initiatives criticize the quality of many of the underlying aging data sets. Regional differences in noise reactions, nonnegligible impacts from contextual modifiers, and results that differ qualitatively and quantitatively from those predicted by standard static exposure–annoyance curves have also been reported. In Europe, noise policies targeting black areas where equivalent noise levels exceed 65 dB(A) have met some success. Nevertheless, the number of noise-annoyed people has increased steadily. This is due to the increase in gray urban areas with intermediary equivalent noise exposure levels between 55 and 65 dB(A). More than two-thirds of European citizens exposed to noise levels exceeding the norm of 55 dB(A) live in gray areas. Here an extended research paradigm needs to supplement the traditional approaches appropriate for targeting annoyance problems in the more easily identified black areas. More precise noise (sound) metrics, improved attention to modifying contextual factors such as quiet sides of apartments and dwellings, multisource situations, neighborhood contexts, vibrations, and other pollutants become important. Owing to the increased complexity of such research, cooperation between traditional and newer noise research initiatives, with researchers involved in air pollution epidemiology and socio-vibrational research, becomes important. Extended reporting for single-site studies and use of multisite, multi-exposure studies and meta-analytical approaches controlling for important contextual and individual modifying factors are thus also warranted.

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