Volume Meter (Relative)
A live microphone level meter in decibels relative to full scale (dBFS). This is not a calibrated sound-pressure (dB SPL) measurement.
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How to use
- Press Start measuring and allow microphone access.
- Watch the current level (in dBFS) and the peak-hold value update in real time.
- Press Stop to release the microphone.
Notes
The reading is in dBFS (decibels relative to digital full scale), not the dB SPL (sound pressure level) a sound level meter measures. 0 dBFS only means the digital input is at its maximum; the same sound gives different values on different devices, microphones and gain settings. It cannot tell you how loud a sound is — it is only useful for comparing levels on the same device. Audio is analyzed on your device and is never recorded or sent anywhere.
FAQ
- Why does a quiet room read around -50 dB?
- dBFS measures distance from the digital maximum, so quiet environments normally read as large negative values. Closer to 0 means closer to clipping — it is not a measure of physical loudness.
- Can this replace a sound level meter?
- No. An uncalibrated microphone and a dBFS readout cannot support legal or health-related decisions. Use a calibrated sound level meter for those.