Procedure
- WARNING: Set device and headphone volume low before start.
- Select a frequency and waveform. Press Start.
- Change frequency slowly. Stop the tone before you disconnect speakers or headphones.
Tone generator
Play sine, square, triangle, or sawtooth reference tones from 20 Hz to 20 kHz.
- Free to use
- Runs on this device
- No account
Hz
Frequency presets
Set a low volume before you start. Use extra care with headphones and high frequencies.
Hearing and equipment safety
A high-frequency tone can sound quiet and still load a tweeter or your hearing. Do not increase volume to make a weak tone easier to hear.
Browser support
Use a current version of Safari, Chrome, Edge, or Firefox. Microphone tools require HTTPS and microphone permission.