How this headphone test works
Put your headphones on, lower the volume, and play a tone on the Left, Right or Center channel. A centered tone should appear in the middle of your head, equally loud in both ears. The stereo pan sweep moves a sound smoothly from left to right and back, so you can hear whether the movement is even. The balance slider lets you shift the output to one side to compare channels.
Other tests are a low frequency test for bass, a hearing range test that plays high tones from 8 to 20 kHz, and a phase check that plays the two channels in and out of phase. The sounds are generated in your browser, and nothing is uploaded or recorded.
How to read the results
- Left and right. Each tone should be heard only in its own ear. If a channel is silent or much quieter, suspect the cable, the plug or a dirty or damaged driver.
- Left and right swapped. If the left tone plays in your right ear, the headphones are on the wrong way round, or the wiring is reversed.
- Stereo imaging. In the pan sweep the sound should travel smoothly across your head with a clear center. Jumps or a hole in the middle suggest a mismatch between the two drivers.
- Phase. In-phase channels sound solid and centered. Out-of-phase (reversed polarity) channels sound thin, hollow and seem to come from outside your head. If the in-phase test sounds hollow, one driver may be wired backwards, which is rare but happens on cheap or repaired headphones.
- Bass. Closed-back headphones usually reach 20 to 40 Hz. If the low tones vanish, check the ear-pad seal first.
- Hearing range. Most adults lose sensitivity above 15–17 kHz with age, and cheap headphones may roll off earlier. This test is informational only and is not a medical hearing test. See a professional if you are worried about your hearing.
Headphones not working? Try these fixes
- Select the right output. On Windows 11 go to Settings → System → Sound → Output. On macOS use System Settings → Sound → Output. On Android and iPhone check the audio output picker.
- Reseat the plug. Push the 3.5 mm or USB-C plug in fully. Clean lint out of the jack with a wooden toothpick.
- Check balance and mono. Center the balance slider in Sound settings and disable mono audio in Accessibility.
- Bluetooth. Forget the device and pair it again. Keep it charged, and keep it away from other devices using 2.4 GHz.
- Try another source. Plug the headphones into a phone or another computer. If one side is still dead, the headphones or cable are at fault.
- Update drivers. On Windows, reinstall the audio or USB driver in Device Manager. On Chromebook, restart and try another port.
Why test your headphones
Many headphone problems are easy to miss while listening to music: a slightly weak right driver, a swapped channel, or a phase error. A short test makes them obvious, helps you decide whether to repair or replace, and confirms the headphones are fine before you return them.
Frequently asked questions
How do I test my left and right headphones?
Press the Left button, then Right. You should hear the tone only in the matching ear. If either side is silent or quiet, check the plug and the output device.
Why is one side of my headphones quieter?
Common causes are a balance setting off-center, a dirty or half-inserted plug, ear wax or lint blocking one driver, or a failing cable.
What does the phase check do?
It plays the two channels in phase and out of phase. Out-of-phase sound feels hollow and vague, so you can tell whether both drivers are wired the same way.
Is the hearing range test a real hearing test?
No. It only shows what your headphones and ears reproduce at high frequencies. It is not a medical test, so see an audiologist if you have concerns.
What is stereo imaging?
It is how well headphones place sounds between left and right. Good imaging gives a clear center and smooth movement across the stereo field.
Why do my headphones have weak bass?
A poor seal around the ears, a worn ear pad, or the wrong equalizer setting can all reduce bass. Try the low frequency test with the headphones pressed gently against your ears.
Left and right are swapped, how do I fix it?
First check that you are wearing the headphones the right way round, since the L and R marks are often small. If the channels are still reversed, look for a channel balance or swap option in your audio settings or driver, or try another cable or jack.
Does this test work with Bluetooth headphones?
Yes, as long as the headphones are connected and selected as the output device in your system. Bluetooth adds a small delay and compresses the audio, so the phase and range checks may differ slightly from a wired connection.