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Headphone Test
Hear the left channel, the right channel, or both, then take a short quiz to confirm the sides.
20%
Alternate left and right
Keep the level low. A swapped cable puts the tone in the opposite ear.
Side quiz
0 of 10
Play a hidden side, then say which ear heard it.
More tests
What it measures
Channels
A tone in the left ear, the right ear, or both, so a swapped cable is obvious.
Quiz
Ten hidden sides. You say which ear heard the tone.
Questions
The sound is in the wrong ear.
Swap the earcups, or check that the system balance is centered and the plug is fully seated.
I only hear one side in the browser.
Some Bluetooth devices mix both channels. Try a wired pair if the quiz never separates left and right.