Is it really free to measure sound levels on your website?

Yes, SoundDecibel.com is completely free to use for everyone. There are no hidden fees, premium plans, or usage limits. Measure as much audio data as you need!

Do I need a special microphone to use this?

No, you can use the built-in microphone on your phone, laptop, or tablet. For better accuracy, you can use the Calibration Offset feature to fine tune your device's microphone.

Is my data safe when using your sound meter?

Absolutely! We prioritize your privacy and security. All audio processing happens locally on your device within the browser. We never record, store, or share your audio data.

Can I use the measurements for professional purposes?

Yes, you're free to use the data generated by our tool for any personal or commercial projects. However, please note that readings depend on your device's hardware. We recommend a dedicated hardware meter for critical legal or safety compliance.

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Display Scale

"Positive" adds an offset to raw dBFS. "Negative" shows the actual dBFS value (usually below 0).

Frequency Weighting

Applies standard frequency weighting using FFT analysis to better reflect perceived loudness (dBA) or low-frequency content (dBC).

Display Update Rate

How often the display and graph update. Faster rates use slightly more CPU for UI rendering.

Peak Hold Time

How long the highest measured peak reading is displayed before potentially resetting.

Calibration Offset

Adjusts the displayed reading (+/- dB) for relative comparison.

Graph Type

Visual representation of the sound level or frequency content.

Accuracy Disclaimer: This tool uses your microphone to measure sound levels. We use technical standards like dBA and dBC weighting to match human hearing. However, because phone and computer microphones vary, this is not a substitute for a professional SPL meter. It measures relative loudness (dBFS), so for exact numbers, you might need to calibrate it. Use it for a general idea, not for strict safety rules. For the best accuracy, turn off any extra sound effects on your device.

Sound Decibel Meter

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