Measure decibels, dBA, dBC and Leq or inspect a live audio spectrum. Every sound tool uses the same private, on-device engine on desktop and phone.
No login • Audio stays on-device • Works on phone & desktop
A-weighted dB(A) that matches perceived loudness. The standard for noise and exposure.
C-weighted dB(C) that keeps bass. For concerts, engines and loud low-frequency sound.
Energy-averaged Leq correctly — the right metric for exposure. With interactive demo.
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Start with the main decibel meter — it has every control (A/C/Z, Fast/Slow, Leq). Then jump to a focused framing when you need it. All readings, calibration and history are shared across tools on the same device.
Open the main measurement experience with localized instructions, controls and sound-level guidance.
A ≈ perceived loudness · C keeps bass · Z is flat physics. Switch in Advanced Controls.
Weighting guide →Leq averages energy correctly; plain average understates loud bursts.
Why Leq matters →Position, distance and duration decide quality. Follow the 8-step workflow.
How to measure →