Online Tone Generator
Click Play to play a constant pure tone. Drag the slider to change the frequency being played. When the slider is active, you can use Left/Right arrow keys to decrease/increase the frequency. Use the ‹ and › buttons to decrease/increase the frequency by 1 Hz.
What can I use this tool for?
Tuning instruments, science experiments (what’s the resonant frequency of this wineglass?), testing audio equipment (how low does my subwoofer go?), testing your hearing (what’s the highest frequency you can hear? are there frequencies you can hear only in one ear?).
Tinnitus frequency matching
If you have pure-tone tinnitus, this online frequency generator can help you determine its frequency. Knowing your tinnitus frequency can enable you to better target masking sounds and frequency discrimination training.
When you find a frequency that seems to match your tinnitus, make sure you check frequencies one octave higher (frequency × 2) and one octave lower (frequency / 2), as it is easy to confuse tones that are one octave apart.