Tone Generator: Generate Audio Frequencies Online | Free Tool

A Audio equipment testing, hearing tests, musical instrument tuning, speaker testing, tinnitus therapy, and educational demonstrations.

A Sine = pure single frequency. Square = buzzy with odd harmonics. Sawtooth = bright with all harmonics. Triangle = mellow, between sine and square.

A Yes, loud tones can damage hearing. Always start at low volume and gradually increase. Avoid prolonged exposure to loud tones.

A The international standard concert pitch. When an orchestra tunes, they tune to A4 at 440Hz.

A This tone generator produces precise *single* audio frequencies (e.g., a pure 500Hz sine wave), not complex broad-spectrum noises like white or pink noise. These broadband noises consist of many frequencies played simultaneously. While you cannot directly generate white or pink noise with this tool for sleep or focus, it's excellent for specific sound therapy, testing, or creating a subtle low-frequency hum (20-100Hz) for a brown noise-like calming effect.

A To locate an unwanted hum or buzz, systematically isolate components. Start by disconnecting all input sources from your amplifier or speakers. If the noise persists, it's likely internal. If it stops, reconnect components one by one. Use the tone generator as a controlled signal (e.g., a 60Hz or 50Hz sine wave to check for ground loops). When the hum reappears, you've identified the faulty component, cable, or power issue.