Spectrum Analyzer
Generate calibration tones (sine, sweep, white/pink noise) and view real-time spectra, spectrograms, and waterfall plots.How to use:The generator on the left emits tones at a chosen frequency, sweeps, and white/pink noise for speaker and headphone calibration (start quietly to protect hearing and equipment);the right side captures the microphone to analyse ambient noise, and the colormap is a log-frequency spectrogram waterfall (brighter means more energy).All processing happens locally in the browser — no audio is uploaded.
Calibration signal generator
Frequency
1.00 kHz
Volume 10%
Sweep calibration
From
To
Duration
s
Ping-pong
Spectrum capture
FFT 8192
Colormap · Viridis
Range 90dB
20 kHz2 kHz200 Hz20 Hz
Time → (newest on the right)Live features (for AI analysis)
Recorded 0 frames @ 10Hz
Peak frequency
—
Spectral centroid
—
85% roll-off
—
Spectral flatness
—
Loudness RMS
—
Crest factor
—
No data |
Noise profile · likely sources
Start the analysis and, after roughly 10 seconds of capture, tap 「Build profile」 to get the band distribution and the likely sources inside the time window.The rule-based verdict is computed entirely on this machine; when the built-in browser AI (Gemini Nano in Chrome/Edge 127+) is ready it can add a judgement and denoising advice — no audio is uploaded.