app.decibelshield/decibel-shield

Estimated daytime/night noise ranges (dB), rank among 50 major world cities, dominant noise sources and confidence for a given city, with WHO guideline context.

The Decibel Shield estimated city noise ranking — 50 major world cities ordered by estimated daytime noise, loudest first.

Decibel level and hearing-risk guidance for everyday sounds (whisper, traffic, chainsaw, concert…), sourced to CDC/NIOSH/NIDCD/ASHA published figures.

How long a sound level is safe to be around per NIOSH's recommended exposure limit (85 dB(A)/8 h, 3 dB exchange rate).

Share of residents exposed to ≥60 dB / ≥70 dB transportation noise for the 100 largest US cities — computed from the federal BTS 2020 National Transportation Noise Map (not estimated). Pass a city name for one city, or omit it for the top of the ranking.