Online Sound Level Meter
Professional-grade sound level measurement with real-time dB monitoring. Track current, peak, and average levels with frequency analysis.
Actual interface shown after microphone access.
Requires microphone access. Audio stays on your device.
Professional Sound Level Measurement
Sound level meters are essential tools in acoustics, occupational health, and environmental monitoring. They quantify sound intensity in decibels, enabling objective assessment of noise levels.
Our online sound level meter provides three key measurements: instantaneous level, peak level, and time-averaged level (Leq equivalent).
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Sound Level Meter FAQ
What is a sound level meter?
A sound level meter (SLM) is an instrument that measures sound intensity in decibels. Our online version provides real-time approximate measurements using your device's microphone.
How is sound level measured?
Sound level is measured in decibels (dB) - a logarithmic unit. Our tool captures audio, calculates the Root Mean Square (RMS) of the signal amplitude, and converts it to a dB scale.
What is the decibel scale?
The decibel scale is logarithmic: every 10 dB increase represents a perceived doubling of loudness. 0 dB is the threshold of hearing, 60 dB is normal conversation, 85 dB is hearing damage risk.
What are peak, average, and minimum readings?
Peak shows the loudest moment in your session, average gives the mean level over time, and minimum shows the quietest moment (your noise floor).
Can this replace a professional sound level meter?
For casual measurements and relative comparisons, yes. For certified occupational health measurements or legal noise assessments, a professional IEC-certified meter is needed.
How long should I measure to get accurate results?
For a meaningful average, measure for at least 2-3 minutes. For noise exposure assessment, longer periods (15-60 minutes) provide more representative data.