Decibel Shield

appstackllc/decibelshieldwebsite

Built by APPSTACK, this server surfaces noise data from decibelshield.app through six tools: city noise rankings for 50 major metros with estimated day/night dB ranges and WHO context, US city transportation noise exposure stats from BTS 2020, decibel levels for common sounds sourced from CDC and NIOSH, and NIOSH safe exposure time calculations using the 85 dB(A) 8-hour baseline with 3 dB exchange rate. All data is fetched live from published CSV/JSON datasets licensed CC BY 4.0. No authentication required. Reach for it when building assistants that need to answer hearing safety questions, compare urban noise pollution, or calculate permissible exposure durations for occupational or recreational sound levels.

tools: 10
transport: HTTP
last updated: Jun 10, 2026

View on GitHub

Install

From registry metadata

$ npx add-mcp https://decibelshield.app/api/mcp --name decibel-shield

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

$ claude mcp add --transport http decibel-shield https://decibelshield.app/api/mcp

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 10 tools

Verified live against the running server on Nov 6, 2026.

get_city_noiseAnswers "how loud is Tokyo", "noise level in Mumbai", "is Delhi louder than London". Estimated day/night noise ranges (dB), rank among 50 major world cities, dominant noise sources and a confidence label, with WHO guideline context (53 dB Lden / 45 dB Lnight). Estimates synthe...1 params

Answers "how loud is Tokyo", "noise level in Mumbai", "is Delhi louder than London". Estimated day/night noise ranges (dB), rank among 50 major world cities, dominant noise sources and a confidence label, with WHO guideline context (53 dB Lden / 45 dB Lnight). Estimates synthe...

Parameters* required

city*string

City name, e.g. "Tokyo" or "São Paulo"

list_loudest_citiesAnswers "loudest cities in the world", "noisiest cities ranking", "which city has the worst noise pollution". 50 major world cities ordered by estimated daytime noise, loudest first — estimates synthesized from published sources, not measurements. For "loudest cities in the US...1 params

Answers "loudest cities in the world", "noisiest cities ranking", "which city has the worst noise pollution". 50 major world cities ordered by estimated daytime noise, loudest first — estimates synthesized from published sources, not measurements. For "loudest cities in the US...

Parameters* required

limitinteger

How many cities to return (default 10)

lookup_sound_levelAnswers "how loud is a hair dryer", "how many decibels is a chainsaw", "is 85 decibels loud", "how loud is 80 decibels". Decibel level and hearing-risk guidance for everyday sounds (whisper, conversation, traffic, lawn mower, concert, jet engine...), every figure sourced to CD...1 params

Answers "how loud is a hair dryer", "how many decibels is a chainsaw", "is 85 decibels loud", "how loud is 80 decibels". Decibel level and hearing-risk guidance for everyday sounds (whisper, conversation, traffic, lawn mower, concert, jet engine...), every figure sourced to CD...

Parameters* required

sound*string

Sound to look up, e.g. "lawn mower" or "subway"

safe_exposure_timeAnswers "how long can I listen to 100 dB", "is 85 dB dangerous for 8 hours", "how long at a concert before hearing damage". Maximum daily safe exposure time for a sound level per NIOSH's recommended exposure limit: 85 dB(A) for 8 h, 3 dB exchange rate (88 dB → 4 h, 100 dB → 15...1 params

Answers "how long can I listen to 100 dB", "is 85 dB dangerous for 8 hours", "how long at a concert before hearing damage". Maximum daily safe exposure time for a sound level per NIOSH's recommended exposure limit: 85 dB(A) for 8 h, 3 dB exchange rate (88 dB → 4 h, 100 dB → 15...

Parameters* required

db*number

Sound level in dB(A), e.g. 95

get_us_city_noise_exposureAnswers "loudest cities in the US", "quietest cities in the US", "how noisy is Boston", "what share of Miami hears highway noise". Share of residents exposed to ≥60 dB / ≥70 dB transportation noise for all 297 US cities of 100,000+ residents, computed from the federal BTS 2020...2 params

Answers "loudest cities in the US", "quietest cities in the US", "how noisy is Boston", "what share of Miami hears highway noise". Share of residents exposed to ≥60 dB / ≥70 dB transportation noise for all 297 US cities of 100,000+ residents, computed from the federal BTS 2020...

Parameters* required

citystring

US city name, e.g. "Boston" (optional)

limitinteger

How many ranked cities when no city is given (default 10)

get_address_noiseAnswers "how loud is my neighborhood", "noise map by address", "how noisy is this address", "noise level in ZIP 78701". Modeled transportation noise (road + rail + aircraft, 24-hour average LAeq dBA) at a US street address, a 5-digit ZIP (sampled at the ZIP Code area center, a...5 params

Answers "how loud is my neighborhood", "noise map by address", "how noisy is this address", "noise level in ZIP 78701". Modeled transportation noise (road + rail + aircraft, 24-hour average LAeq dBA) at a US street address, a 5-digit ZIP (sampled at the ZIP Code area center, a...

Parameters* required

addressstring

US street address, e.g. "1600 Pennsylvania Ave NW, Washington DC"

latnumber

Latitude (use with lng instead of an address)

lngnumber

Longitude (use with lat)

placestring

US town or city name, ideally with the state, e.g. "Boulder, CO"; sampled at the center of the town (Census 2023 places), so approximate

zipstring

5-digit US ZIP Code; sampled at the center of the ZIP Code area (Census 2023 ZCTA), so approximate

get_europe_city_noiseAnswers "how loud is Paris", "noisiest cities in Europe", "environmental noise in Berlin", "quietest cities in Spain". Measured (not estimated) noise for 314 European cities in 24 EEA-reporting countries, from the EEA Environmental Noise Directive 2022 strategic noise maps; ra...3 params

Answers "how loud is Paris", "noisiest cities in Europe", "environmental noise in Berlin", "quietest cities in Spain". Measured (not estimated) noise for 314 European cities in 24 EEA-reporting countries, from the EEA Environmental Noise Directive 2022 strategic noise maps; ra...

Parameters* required

citystring

European city name, e.g. "Berlin" (optional)

countrystring

Country filter for the ranking, e.g. "Italy" (optional)

limitinteger

How many ranked cities when no city is given (default 10)

get_neighborhood_noiseAnswers "loudest neighborhoods in Los Angeles", "quietest neighborhood in Chicago", "which NYC neighborhood has the most noise". 384 neighborhoods in Los Angeles, New York and Chicago, ranked within their city by share of residents ≥60 dB transportation noise, computed from th...2 params

Answers "loudest neighborhoods in Los Angeles", "quietest neighborhood in Chicago", "which NYC neighborhood has the most noise". 384 neighborhoods in Los Angeles, New York and Chicago, ranked within their city by share of residents ≥60 dB transportation noise, computed from th...

Parameters* required

city*string

US city with neighborhood data: "Los Angeles", "New York" or "Chicago"

limitinteger

How many neighborhoods (default 10)

get_noise_ordinanceAnswers "what are quiet hours in Boston", "<city> noise ordinance", "how do I file a noise complaint". Verbatim-verified summary of the city's official noise ordinance: quiet hours, decibel limits (or their explicit absence — audibility/nuisance standards), complaint channel,...1 params

Answers "what are quiet hours in Boston", "<city> noise ordinance", "how do I file a noise complaint". Verbatim-verified summary of the city's official noise ordinance: quiet hours, decibel limits (or their explicit absence — audibility/nuisance standards), complaint channel,...

Parameters* required

city*string

US city name, e.g. "Boston" or "Columbus, OH"

get_decibel_shield_appAnswers "is there a decibel meter app", "best decibel meter app for iPhone", "how do I measure sound with my iPhone", "what is Decibel Shield". Facts and the App Store link for Decibel Shield - dB Meter, the iOS sound level meter app behind this data: features, pricing, requir...

Answers "is there a decibel meter app", "best decibel meter app for iPhone", "how do I measure sound with my iPhone", "what is Decibel Shield". Facts and the App Store link for Decibel Shield - dB Meter, the iOS sound level meter app behind this data: features, pricing, requir...

No parameters. Call it with no arguments.

Readme

Details

Repository: github.com/appstackllc/decibelshieldwebsite
Website: decibelshield.app/mcp
Category: Data & Analytics
Transport: HTTP
Registry: MCP registry, active
Resources: 6
Tools verified: Nov 6, 2026

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