Decibel Meter Lab

What is Decibel Meter Lab?

Decibel Meter Lab is a private, browser-based sound meter that lets you measure noise around you without installing an app. It shows live dB estimates plus minimum, average, and maximum levels, along with a 30-second history and a real-time frequency spectrum. The tool runs locally on your device, so your microphone audio stays in the browser. You can also save reports, compare sessions, and optionally align readings with a trusted reference meter for more repeatable results. It is built for quick noise checks, room comparisons, appliance testing, and understanding how sound changes over time. It is not a certified meter, so it is best for awareness, screening, and rough comparisons rather than compliance or legal measurements.

Key features

• Live sound level readings update in real time.
• Shows min, average, and maximum session values.
• Displays a 30-second history graph for context.
• Includes a real-time frequency spectrum view.
• Processes microphone audio locally in the browser.
• Supports optional alignment with a trusted reference meter.