What this test can tell you
The controls request a frequency and waveform from the browser’s audio generator. Compare what your selected output can reproduce at a low, comfortable level.
The page does not measure actual acoustic frequency response or sound pressure. A missing tone can reflect hardware, settings or hearing; do not increase volume to chase it.
How to use it
- Set the frequency with the slider or type an exact value.
- Choose a waveform and volume.
- Press Play; adjust while it plays.
Waveforms
Sine is a pure tone. Square and sawtooth contain many harmonics and sound buzzy, which helps reveal rattles. Triangle sits in between.
Not working? Try these fixes
I cannot hear very low or high tones
The output device and audio path may not reproduce the requested range. A missing tone does not identify whether the limit is hardware, settings or hearing. Keep volume low; headphones also have limits.
Frequently asked questions
What is 440 Hz?
The standard tuning note A4.
Can a tone damage my hearing?
Loud tones can. Keep the volume low, especially with headphones.