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Audio & Sensors • Real-Time Decibel VU Meter

Microphone Input Tester – Real-Time Decibel VU Meter

Tests device microphone input, measures real-time sound pressure levels (dB), and displays frequency response spectrum.

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Free • No InstallAccess Tier

Microphone Input & Decibel Visualizer

Audio & Sensors

Tests device microphone input, measures real-time sound pressure levels (dB), and displays frequency response spectrum.

Sound Level (VU Meter):
Current Decibels:—
Peak Volume:—
Quick Actions Ready
Hardware Note: Smartphones have multiple mics (bottom talk mic, top noise cancellation mic). If the VU meter stays silent or clips continuously, the mic flex or acoustic mesh port is clogged.

Frequently Asked Questions

How do I test the secondary noise-canceling microphone on Android phones?

Modern phones have at least two microphones: primary bottom mic for speech and secondary top mic for active noise cancellation. Record audio while tapping near the top bezel to inspect whether input waveform frequencies register cleanly.

What does a Decibel VU Meter measure?

A Volume Unit (VU) meter measures perceived acoustic audio volume relative to full digital scale (dBFS). Zero dBFS represents the maximum digital signal level before clipping distortion occurs.

Does this microphone test save audio recordings?

No. All audio streams from navigator.mediaDevices.getUserMedia are analyzed in real-time memory via the Web Audio API FFT analyzer and discarded immediately upon termination.

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