How to use the headphone test
- Connect your headphones/earphones and set volume low.
- Left ear should play only in your left ear, Right ear only in your right.
- Stereo pan sweep moves sound smoothly from left to right – it should travel without gaps.
- Phase test checks wiring. Correct headphones make it sound hollow and thin.
Troubleshooting
- Sound only in one ear: try another device. If it’s the same, the earphone cable or driver is damaged. If not, the laptop’s headphone jack may be faulty.
- Left and right reversed: check you’re wearing them correctly (L/R marks), then check Windows balance settings.
- Crackle when moving the cable: a loose wire near the plug – common in earphones.
- Bluetooth headphones: make sure Windows uses “Stereo” not “Hands-Free” mode for good audio.
Laptop headphone jack issues
If every pair of earphones sounds wrong on one laptop, the 3.5 mm jack may be worn or dirty. On used laptops it’s worth testing with your own earphones before buying.
Frequently asked questions
Is this a left right audio test?
Yes – it plays tones in the left channel, right channel and both, plus a smooth pan between them.
Do I need special software?
No. It runs in the browser on laptops and phones.