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Acoustic Analyzer

Real-time audio visualization and spectrum analysis directly in your browser

This interactive demo captures audio from your device's microphone and provides real-time visualization of sound characteristics. Perfect for understanding environmental acoustics, voice analysis, or simply exploring how sound looks when visualized.

Live Audio Analysis

Inactive

Volume Level

Peak Frequency

— Hz

Frequency Range

0-22k

⚠️ Important Disclaimer: This analyzer is designed for educational and demonstration purposes. Device microphones vary significantly in quality, frequency response, and calibration. Results are approximate visualizations and should not be used for precise acoustic measurements or professional audio analysis.

How to Use

Grant Microphone Permission: Click "Start Analyzer" and allow your browser to access your microphone when prompted
View Real-Time Analysis: The frequency spectrum (top) shows which frequencies are present in the sound, while the waveform (bottom) displays the audio signal over time
Monitor Metrics: Watch the volume level, dominant frequency, and frequency range update in real-time
Stop Analysis: Click "Stop Analyzer" to end the session and release microphone access

Understanding the Visualizations

Frequency Spectrum (Top Graph): Shows the intensity of different frequencies in the audio. Taller bars indicate stronger presence of that frequency. Low frequencies are on the left, high frequencies on the right
Waveform (Bottom Graph): Displays the raw audio signal amplitude over time. Larger waves indicate louder sounds. This visualization helps identify rhythm, dynamics, and temporal patterns
Volume Level: A relative measure of overall sound intensity from 0 (silence) to 100 (very loud)
Peak Frequency: The most dominant frequency currently present in the audio signal, measured in Hertz (Hz)
Frequency Range: The span of frequencies the analyzer can detect, typically 0 Hz to 22 kHz (limited by your device's sampling rate)

Technical Implementation

This analyzer uses the Web Audio API to access microphone input and perform real-time Fourier transforms (FFT) to decompose the audio signal into its frequency components. The visualization is rendered using HTML5 Canvas with smooth animations and gradient effects.

Try These Experiments

Whistle or Hum: Watch a clear spike appear in the frequency spectrum at the pitch you're producing.

Clap Your Hands: Observe the sharp transient in the waveform and broadband energy in the spectrum.

Play Music: See how complex sounds create rich patterns across multiple frequencies simultaneously.

Different Environments: Compare the ambient noise signature of quiet rooms versus busy spaces.

Browser Compatibility

This analyzer works on all modern browsers that support the Web Audio API, including Chrome, Firefox, Safari, and Edge on both desktop and mobile devices. For best results, use a recent browser version and ensure microphone permissions are granted.