FreqTester Pro

Volume Warning: High frequency sounds can be intense! Start with low volume and avoid prolonged listening.
Frequency Control

Tone Generator Custom

Stopped
15,000 Hz
Typically heard by: Under ~30-35 years old
Audio Spectrum & Visualizer Realtime Signal
Spectrum line will move when audio plays (even if you can't hear it!)
Frequency (Pitch) 20 Hz – 22,000 Hz
Volume Level 30%

Hearing Range Presets

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Test different thresholds to see who in the room can hear the sound!

Hardware Note: Phone or laptop speakers often cut off sounds above 17-18 kHz. If you can't hear high frequencies, it might be due to speaker limits or age!
Interactive Challenge

What's Your Hearing Age?

Take this step-by-step blind hearing test. We will play short high-frequency tones ranging from 8 kHz up to 20 kHz. Be honest—click "I Hear It!" only if you actually hear the beep!

Put on headphones or turn up volume moderately before starting.

The Science of High-Pitched Tones

Why can younger people hear high pitches better?

1

Presbycusis (Age Hearing Loss)

Inside your inner ear (cochlea) are thousands of tiny hair cells called cilia. Hair cells that detect ultra-high frequencies are located right near the entrance of the ear organ. Over time and continuous noise exposure, these delicate cells naturally degrade and do not regenerate.

2

The "Mosquito" Story

In the mid-2000s, a device called "The Mosquito" was created to play a ~17 kHz tone to deter loitering. Teenagers quickly flipped the trick into a famous smartphone ringtone—so their phones could ring in class without adult teachers hearing a thing!

3

Hearing Protection

Human hearing normally spans from 20 Hz to 20,000 Hz. Protecting your ears from extreme loudness (concerts, earphones at 100% volume) helps preserve your high-frequency cilia so you can hear higher pitches for longer in life.