/signal — Signal Generator
A Web Audio signal generator: pure tones (sine, square, triangle, saw), white and pink noise, a frequency sweep, and a step-by-step hearing test. Per-channel left/right. Everything is synthesized live in your browser — nothing is recorded or uploaded.
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Start low and protect your ears — high volumes and sustained tones can damage hearing. Frequencies above ~15 kHz are inaudible to many adults.
A quick check of the top end of your hearing. Put on headphones at a comfortable, moderate volume. A tone will play at each frequency — press I can hear it if you do, or Silence if you do not. This is a rough, fun indicator, not a medical audiogram.
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Press start to begin