Hearing Age Test

Sound is detected by hair cells in the cochlea, arranged like keys on a piano — high frequencies at one end, low at the other. The high-frequency cells sit closest to the entrance, take the most punishment over a lifetime, and do not regenerate. So the top of your range erodes from the top down, steadily, from your late teens onward.

That erosion is called presbycusis, and it is not a disease — it is the default. A newborn hears to roughly 20 kHz. By thirty most people are nearer 16 kHz, and the slide continues from there. Because it is so consistent, the point where you stop hearing is a decent proxy for age.

Around 17 kHz sits a band that most teenagers hear and most adults do not. It has been used commercially in both directions: shops have fitted devices that emit it to make young people uncomfortable enough to move on, and students have used it as a phone ringtone that teachers cannot hear.

If you cleared 17 kHz in the test, that is the tone you were hearing. Being unable to hear it is not a defect — it is the single most predictable thing about adult hearing.

This test measures your ears through your hardware, and above 15 kHz the hardware often gives out first:

• Laptop and phone speakers frequently cannot reproduce 16 kHz at any useful level. A silent tone may mean a silent speaker.
• Bluetooth codecs discard the top of the spectrum to save bandwidth. Wired headphones give a cleaner reading.
• Volume. High frequencies need more level to be audible. Too quiet reads as deafness; too loud is genuinely harmful.
• Distortion at the limit. A driver struggling at 20 kHz can produce audible artefacts lower down. That is why a result above 20 kHz should be read as a speaker problem, not a superpower.
• Age of the file, not the ear. Any audio that has been through a lossy codec has had this exact band thinned out already.

The band this test probes is the least useful one you own. Human speech lives between roughly 500 Hz and 4 kHz, and almost all of music sits below 10 kHz. You can lose everything above 14 kHz and notice nothing at all in daily life.

What actually matters clinically is the speech range, and that is measured with an audiogram in a quiet booth with calibrated equipment — not with a browser tab. This page cannot detect the kind of hearing loss worth treating, and a good score here does not rule one out.

Signs that deserve a professional rather than a web page: one ear clearly different from the other, persistent ringing, sudden change, or trouble following conversation in a noisy room. Sudden loss in one ear is treated as urgent — the treatment window is measured in days.

Hair cells do not grow back, so the only strategy is not losing more. The damage is a product of loudness and time together — the louder it is, the less time it takes.

• The 60/60 habit. Roughly 60% volume for no more than 60 minutes at a stretch is a widely repeated rule of thumb for headphones.
• Noise-cancelling helps by accident. Cutting the background means you stop turning the volume up to bury it.
• Concerts and power tools. A few hours of either can do what years of normal listening will not. Cheap earplugs work.
• Ringing after an event is a warning. Temporary tinnitus means the hair cells took a hit; repeated hits become permanent.