Headphone test.
Check your left and right earcups, compare their balance, and try a short frequency sweep. Connect your headphones and start with a low volume.
Start low. Your system volume also affects loudness.
Sweep: 80 Hz–12 kHz. This is a listening check, not a hearing test.
Ready. No sound plays until you choose a test.
Uses your system’s current audio output. No microphone permission needed.
Test the left and right sides of your headphones
Play the left ear and right ear separately. Each signal should be isolated to the expected side when mono audio, crossfeed, and spatial effects are disabled. The stereo sequence repeats left, right, and both. If one side is missing, check the plug, adapter, cable, balance setting, or Bluetooth connection before assuming the driver has failed.
Check the center image
Check centered sound sends the same 330 Hz tone to both channels for two seconds. It should feel approximately centered with properly worn headphones and balanced settings. Ear seal, fit, personal hearing differences, and processing can shift that image. Compare fit and system balance before changing gain to compensate.
Listen through a short frequency sweep
The sweep moves from 80 Hz to 12 kHz over eight seconds at the selected test volume. It can reveal obvious buzzes, rattles, or dropouts. Perceived loudness naturally changes with frequency, and not every listener or headphone reproduces the whole range equally. The test does not measure your hearing or produce a calibrated headphone frequency-response graph.
Bluetooth and wireless headphone checks
A Bluetooth device may change quality when its microphone is active in another app. Close calls or recording apps and compare again. Use the same comfortable volume for each comparison. If a problem appears only over Bluetooth, compare a wired connection when your equipment supports it. Test the headset microphone separately.
Good questions.
Clear answers.
Can I test earbuds and gaming headsets here?
Yes. Select them as the system output first. The stereo test works with headphones, earbuds, and headsets when the browser supports Web Audio.
Why do both ears play during a left-only test?
Mono accessibility settings, spatial effects, crossfeed, or device processing may mix channels. Turn those off temporarily if you want a direct channel-routing comparison.
Is the sweep a hearing test?
No. Output loudness is not calibrated, and headphones and browser processing differ. Do not use this tool to assess hearing loss or to raise the volume until every frequency is audible.
Can this measure Bluetooth latency?
No. These channel and frequency checks do not measure end-to-end delay. A separate synchronized measurement is needed for latency.