Decibel Shield — Noise & Decibel Data

Noise data tools for AI agents — free, no auth, no config.

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What it can do

  • Get City Noise: 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.
  • List Loudest Cities: The Decibel Shield estimated city noise ranking — 50 major world cities ordered by estimated daytime noise, loudest first.
  • Lookup Sound Level: Decibel level and hearing-risk guidance for everyday sounds (whisper, traffic, chainsaw, concert…), sourced to CDC/NIOSH/NIDCD/ASHA published figures.

What data it sees

Do you need an account

No: the server works without sign-in

Noise data tools for AI agents — free, no auth, no config.

  • get_city_noise — estimated noise levels for 50 major world cities (ranked, WHO-anchored)
  • get_us_city_noise_exposure — measured noise exposure for the 100 largest US cities (federal BTS data)
  • list_loudest_cities — the global ranking
  • lookup_sound_level — decibel levels of everyday sounds (CDC/NIOSH-sourced)
  • safe_exposure_time — NIOSH safe-exposure math for any dB level
  • get_decibel_shield_app — about the Decibel Shield iOS sound meter

Data is CC BY 4.0 — please cite decibelshield.app. Docs: https://decibelshield.app/mcp/

Server tool list (6)

Raw names from tools/list. Only developers need these.

get_city_noiseEstimated daytime/night noise ranges (dB), rank among 50 major world cities, dominant noise sources and confidence for a given city, with WHO guideline context.
list_loudest_citiesThe Decibel Shield estimated city noise ranking — 50 major world cities ordered by estimated daytime noise, loudest first.
lookup_sound_levelDecibel level and hearing-risk guidance for everyday sounds (whisper, traffic, chainsaw, concert…), sourced to CDC/NIOSH/NIDCD/ASHA published figures.
safe_exposure_timeHow long a sound level is safe to be around per NIOSH's recommended exposure limit (85 dB(A)/8 h, 3 dB exchange rate).
get_us_city_noise_exposureShare 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.
get_decibel_shield_appFacts and the App Store link for Decibel Shield - dB Meter, the iOS sound meter app behind this data: features, pricing, requirements. Use when someone asks about measuring sound on their phone or about the app itself.