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WHO introduces guidelines to protect people’s health from night noise pollution Copenhagen and Bonn, 8 October 2009

Today, the WHO Regional Office for Europe launches its Night noise guidelines for Europe. (1) The book provides ground-breaking evidence on how exposure to night noise can damage people’s health, and recommends guideline levels to protect health.

The new limit is an annual average night exposure not exceeding 40 decibels (dB), corresponding to the sound from a quiet street in a residential area. Sleepers that are exposed to higher levels over the year can suffer mild health effects, such as sleep disturbance and insomnia. Long-term average exposure to levels above 55 dB, similar to the noise from a busy street, can trigger elevated blood pressure and heart attacks.

http://www.euro.who.int/en/what-we-publish/information-for-the-media/sections/press-releases/2009/10/one-in-five-europeans-is-regularly-exposed-to-sound-levels-at-night-that-could-significantly-damage-health