Audio
Headphone / earbud test
Check left, right, center, and short spot tones at a low level.
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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.
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Details and limits
Plays low-volume left/right/center tones and optional frequency spots only after you press a button. Not a hearing or audio-quality certification.
How to check
Connect headphones, play Left, Right, and Center, then confirm what you heard. Optionally try a short spot tone. Stop anytime.
If something feels wrong
If one side is silent, check cable balance and OS mono settings, then retry wired if you can.
Limits
Bluetooth codecs, spatial audio, forced mono, and tip fit change what you hear. This is not an audiology or frequency-response test.
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.