# Night noise guidelines for Europe

World Health Organization Regional Office for Europe · WHO · 2009



## Key finding

Recommends outdoor night noise below 40 dB (L_night) to protect health; effects begin around 30–35 dB indoors.



[Read the paper](https://pubmed.ncbi.nlm.nih.gov/?term=Night+noise+guidelines+for+Europe)

---
Educational summary of published research, not medical advice. Screening scores are not diagnoses. If a score is elevated or you feel unwell, talk to a clinician.

SleepShred for iPhone: https://apps.apple.com/app/id6802040541