What to do
Play or make a steady sound near the microphone. Let the frequency display stabilize before capturing a reading.
Microphone Frequency Analyzer
Visualize microphone frequency content and dominant pitch with Web Audio.
Dominant Frequency0Hz
Signal Level0
Digital levelNot measured
StatusIdle
Local history
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How to use this test
What to look for
The highest band may be a harmonic rather than the fundamental pitch. Quiet input can give an unstable reading.
Web Audio analyzes the microphone signal after you grant access. dBFS describes digital signal level; it is not calibrated sound pressure in dB SPL. Gain, noise suppression, distance, and room noise affect readings.