Can I retrain my ears?

No. Once the hair cells are gone, they are gone. Protect what you have left by avoiding loud concerts (or wearing plugs).

Is my phone speaker good enough?

Maybe. Most phone speakers roll off around 16kHz. High-quality headphones are needed for the 20kHz test.

The theoretical upper limit of human hearing. Anything above that is ultrasonic (bats and dolphins).

Bio-Frequency Ear Test

How old are your ears? Test your sensitivity to high-frequency sounds.

📜 The Origins

As we age, we lose the ability to hear high frequencies (presbycusis). However, many neurodivergent individuals retain 'younger' hearing longer, leading to hypersensitivity.

🚀 Master the Tool

Turn your volume down first! Press the buttons to play high-frequency tones. Stop when you can no longer hear the sound.

Frequency Generators

Note

Please **lower your volume to 20%** to avoid ear discomfort. Click “HEARD?” only if you can clearly hear the tone to accurately estimate your biological ear age.

Safety First!

High frequency sounds can be piercing. Please lower your volume to 20% before starting.

Biological Ear Age Estimator

8 kHz • Everyone

10 kHz • Under 60

12 kHz • Under 50

14 kHz • Under 40

15 kHz • Under 30

16 kHz • Under 24

17 kHz • Under 20

18 kHz • Under 18

19 kHz • Under 15

20 kHz • Dog / Alien

Bars light up as you confirm hearing each frequency

Unknown

Based on Max Frequency: Testing...

Sensitivity

Standard

Tone Status

IDLE

The Mosquito Tone

As we age, the hair cells in our cochlea (inner ear) die off. The first to go are the ones tuned to high frequencies. * 8 kHz: Everyone can hear this. * 15 kHz: Most adults over 40 cannot hear this. * 17.4 kHz: The "Mosquito Tone." Only children and teens (and dogs) can hear it.

Weaponized Sound

Shopkeepers in the UK famously installed "Mosquito Alarms" that broadcast at 17.4kHz to stop teenagers from loitering. The adults couldn't hear it, but the teens found it agonizing. This is biologically discriminatory sonic warfare.

Hypersensitivity (Hyperacusis)

Some neurodivergent individuals retain high-frequency hearing well into adulthood. While cool, it can be painful. The whine of a CRT monitor or a cheap phone charger can sound like a scream to them.