Decibel Meter
    Audio · Sound level

    Decibel meter

    Measure how loud it is around you with your device's microphone. The dB reading is an estimate unless you calibrate it.

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    Headphone & hearing check

    Step 4 of 4 · Channels, frequency response, your hearing range and the room's noise level.

    1. 1Left right audio test
    2. 2Sound test
    3. 3Hearing range test
    4. 4Decibel meter

    That's the last step. Start the gaming setup check.

    About the decibel meter

    Updated

    The decibel meter reads your microphone with echo cancellation, noise suppression and automatic gain turned off, and calculates the RMS level ten times a second. It shows the exact input level in dBFS and an estimated, unweighted dB SPL equal to dBFS plus an offset. The default offset is a rough starting point, so match it against a reference sound level meter if you need real numbers. It also tracks minimum, maximum, energy-averaged level (Leq), a held sample peak and the last 60 seconds as a graph. Audio is analysed on your device and never recorded or uploaded.

    How to use it

    1. Press Start meter and allow microphone access.
    2. Pick your microphone if you have more than one.
    3. Hold the device still and point the mic at the sound you want to measure.
    4. If you have a sound level meter, play a steady sound and adjust the offset until both readings match.

    Frequently asked questions

    How accurate is an online decibel meter?

    The dBFS input level is exact, but the dB SPL figure depends on your microphone's sensitivity, which the browser does not report. Uncalibrated, treat it as a rough estimate; with the offset matched to a reference meter it becomes much closer.

    What is the difference between dBFS and dB SPL?

    dBFS is the digital level relative to the loudest signal the mic input can record, so it is always 0 or below. dB SPL is the actual sound pressure in the room, which needs a calibrated microphone to measure.

    How loud is too loud?

    Long or repeated exposure above about 85 dB can damage hearing. Normal conversation is around 60 dB and heavy traffic around 80 dB.