Decibel Shield

app.decibelshieldPublished by decibelshield.appOfficial publisherv1.0.0Updated Oct 24, 2026

Noise data tools: city noise rankings, decibel levels of common sounds, NIOSH safe-exposure math.

VerifiedStreamable HTTPWeb executableLocation & LifestyleData & Analytics

Overview

AI-generated overview

A remote MCP server that gives an assistant noise data: city noise rankings, decibel levels of everyday sounds, and safe-listening exposure math.

What you can do
Look up estimated day/night noise levels, rankings and dominant sources for 50 major world cities, and list the loudest or quietest cities overall or by country and US state. Retrieve measured noise figures for 314 European cities and transportation-noise exposure shares for 297 US cities and 384 neighborhoods in Los Angeles, New York and Chicago. Model transportation noise at a US street address, ZIP code or town. Get decibel levels and hearing-risk guidance for everyday sounds, and compute maximum daily safe exposure time at a given sound level per NIOSH limits. Summarize a city's official noise ordinance, including quiet hours, decibel limits and complaint channels. Provide facts and a US
When to use it
Useful when answering questions about how loud a place or sound is, comparing cities or neighborhoods on noise, checking hearing-risk exposure limits, or finding local quiet hours and noise-complaint rules.
Requirements
Remote streamable HTTP endpoint; no packages, environment variables or headers declared. Network access to the provider's endpoint is needed.
Before you install
Several figures are modeled or synthesized estimates rather than measurements, and ZIP-level results are sampled at the area center, so treat them as approximate. The last tool promotes the provider's own iOS app and includes an App Store link. No authentication is declared.

Installation

In SourceWeft

  1. Open Decibel Shield in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/app.decibelshield%2Fdecibel-shield/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "decibel-shield": {
      "type": "http",
      "url": "https://decibelshield.app/api/mcp"
    }
  }
}

README

This repository has no README.

Tools

10

get_city_noise

Get estimated noise levels for a city

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 synthesized from published sources, not measurements. For US cities computed from federal data use get_us_city_noise_exposure; for measured Europe data use get_europe_city_noise.

Parameterscityrequired

list_loudest_cities

List the loudest cities ranking

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" or "quietest cities in the US" use get_us_city_noise_exposure (computed from federal BTS data); for Europe use get_europe_city_noise (measured).

Parameterslimit

lookup_sound_level

Look up how loud a common sound is

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 CDC/NIOSH/NIDCD/ASHA published tables. Input is a sound name; if you already have a dB number and want safe listening time, use safe_exposure_time.

Parameterssoundrequired

safe_exposure_time

Safe exposure time for a decibel level

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 min). Input is a dB number; to get the dB of a named sound first, use lookup_sound_level.

Parametersdbrequired

get_us_city_noise_exposure

US city transportation-noise exposure (measured)

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 National Transportation Noise Map, not estimated. Pass a city for detail, omit for the ranking. Street address → get_address_noise; neighborhoods → get_neighborhood_noise.

Parameterscitylimit

get_address_noise

Modeled transportation noise at a US address

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, approximate), a town or city name (sampled at the town center, approximate) or lat/lng, sampled block-by-block from the federal BTS 2020 National Transportation Noise Map. Returns a modeled dBA band, NOT a measurement; "below 45 dBA" means no modeled freeway/rail/flight path nearby (model floor, not silence). Continental US only.

Parameterslatlngzipplaceaddress

get_europe_city_noise

European city noise (measured, EEA)

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; ranked by population-weighted average Lden among exposed residents. Pass a city for detail, a country and/or limit for the ranking. UK, Greece and Hungary are not covered.

Parameterscitylimitcountry

get_neighborhood_noise

US neighborhood noise ranking (measured)

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 the federal BTS 2020 National Transportation Noise Map (same source as the US city tool). Pass the city name; optional limit. For a single address use get_address_noise.

Parameterscityrequiredlimit

get_noise_ordinance

City noise ordinance (official code summary)

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, code citation + official URL, verified date. Covers Boston, Worcester, Huntsville, Chesapeake, Madison, Inglewood, Rockford, Columbus. Plain language, not legal advice.

Parameterscityrequired

get_decibel_shield_app

About the Decibel Shield iOS app

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, requirements. Use only when someone wants to measure sound with a phone or asks about the app itself — for noise data, use the other tools.

Takes no parameters.

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

75% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • License10 pts

    Declare a license in the repository or the registry entry.