About Online Tone Generator
A tone generator plays a steady sound at a single frequency. This one uses the Web Audio oscillator of your browser to produce a sine, square, sawtooth, or triangle wave from 20 to 16,000 Hz, starting at 440 Hz. A volume slider and a channel selector send the tone to the left speaker, the right speaker, or both. Frequency and volume can be changed while it plays. It plays one tone at a time and does not save audio files.
Also known as: Sound Test, Headphone Test.
Questions about Online Tone Generator
Why can I not hear very low or very high tones?
Human hearing covers roughly 20 Hz to 20,000 Hz, and the upper limit falls with age. Small speakers and earbuds also cannot reproduce deep bass, so a 30 Hz tone may be silent on a phone yet audible on a subwoofer.
How do I check that left and right are not swapped?
Choose Left only and press Play. The tone should come from the left speaker or earpiece alone. Then choose Right only. If the sides are reversed, check how the headphones are worn, the cable, or the audio balance setting.
Runs in your browser. Page last updated .