Audio
Headphone / earbud test
Check left, right, center, and short spot tones at a low level.
After starting, press Left, Right, or Center to hear a low test tone.
Starts quietly with short tones. Not a hearing or acoustics certification.
This does not rate headphone sound, isolation, or hearing health — only what you heard.
Browser channel routing does not prove driver or housing quality.
Playing: —
Details and limits
How to check
Connect headphones, play Left, Right, and Center, then confirm what you heard. Optionally try a short spot tone. Stop anytime.
Limits
Bluetooth codecs, spatial audio, forced mono, and tip fit change what you hear. This is not an audiology or frequency-response test.
If something feels wrong
If one side is silent, check cable balance and OS mono settings, then retry wired if you can.
FAQ
Will it play a loud sweep?
No. Only low initial volume and short tones, started by your click.
Does it certify phase or sound quality?
No. It records hearing observations and your confirmations only.