What is 15,000 Hz?
15,000 Hz is a tone in the very high treble region — near the top of human hearing. Its nearest musical note is A#9 (about +10 cents away), and its sound wave is roughly 0.023 m long in air. Because it is a pure sine wave, it contains only this one frequency with no harmonics, which is exactly what you want for testing and calibration.
15,000 Hz is a popular 'how old are your ears' test tone. Most people under about 40 hear it easily; sensitivity here tends to fade with age and noise exposure. Hearing nothing is common past midlife and is not by itself a cause for alarm.
What you can use a 15,000 Hz tone for
- Informal 'hearing age' / high-frequency hearing checks
- Testing tweeter and headphone treble response
Can you hear 15,000 Hz?
Sensitivity up here fades with age and noise exposure. Many people under 40 hear it easily while older listeners may not — that is normal. If you are testing your hearing, do it at a modest, consistent volume in a quiet room and compare both ears. For a full walkthrough, see our at-home hearing range test guide. Remember this is a self-check, not a medical diagnosis.
Frequently asked questions
What is a 15000 Hz test tone?
A 15000 Hz test tone is a pure sine wave vibrating 15,000 times per second. It falls in the very high treble range (near the top of human hearing) and its nearest musical note is A#9. You can play it instantly above to test audio equipment or your hearing.
Can everyone hear 15000 Hz?
Sensitivity up here fades with age and noise exposure. Many people under 40 hear it easily while older listeners may not — that is normal.
What note is 15000 Hz?
The nearest equal-tempered note to 15000 Hz is A#9 (about +10 cents away).
Is it safe to play 15000 Hz?
Yes, at a sensible volume. Start low and raise it gradually. Very loud tones of any frequency can harm hearing or, at very low frequencies, over-drive speakers — so keep levels comfortable and take breaks.
Explore more test tones
Need a different pitch? Browse every test-tone frequency, or jump to a nearby one:
You can also use the full test tone generator for frequency sweeps, speaker balance and polarity checks, and the tinnitus matcher.