RealtimeSoundMeter

What is RealtimeSoundMeter?

RealtimeSoundMeter is a free online sound meter that measures noise levels with your microphone right in the browser. It shows live decibel readings, plus min, average, and max values so you can understand both steady noise and sudden spikes. The tool also includes a short history chart, a frequency view, and a simple noise guide to help you judge whether a space is quiet, moderate, harmful, or dangerous. You can save a PDF report on your device for documentation, and the site keeps audio processing local for privacy. It’s useful for home noise checks, office and study environments, speaker tests, and general hearing protection awareness. The page also explains safe exposure times, measurement tips, calibration limits, and how to make readings more repeatable over time.

Key features

• Real-time dB readings from your browser microphone.
• Shows minimum, average, maximum, and history charts.
• Generates a PDF report directly on-device.
• Keeps all audio processing local for privacy.
• Includes safe exposure guidance and noise level context.
• Offers alignment and repeatability tips for better comparisons.