11000 Hz
Treble (4–20 kHz) · F9
Turn the volume down before you play. A pure tone is harder on the ears than music at the same level.
Common value
A value that comes up often in searches and tests.
| Wavelength | 3.1 cm |
|---|---|
| Period | 90.9 µs |
| Nearest note | F9 |
| Off by | -27 cents |
| Audible | Yes |
| Harmonics | 22000 Hz · 33000 Hz · 44000 Hz |
| One octave down | 5500 Hz |
| One octave up | 22000 Hz |
How to read this
- Hertz counts how many times the air vibrates per second. The bigger the number, the higher the pitch.
- Wavelength is the speed of sound (343 m/s at 20 °C) divided by the frequency. That makes 20 Hz seventeen metres long and 20 kHz under two centimetres.
- People hear roughly 20 Hz to 20 kHz, but the upper limit drops with age. Past about 15 kHz, some hear the tone and some do not.
- Hearing nothing does not mean the equipment is broken. Small speakers cannot reach the low notes, and for the high ones it is the ear that gives up first.
Frequently asked questions
Q. What does 11000 Hz sound like?
It is a pure tone vibrating 11000 times a second. It falls inside the range people hear, and the nearest musical note is F9.
Q. What is the wavelength of 11000 Hz?
3.1 cm in air. Sound travels 343 metres per second through 20 °C air, so the wavelength is that distance divided by 11000.
Q. What note is 11000 Hz?
The nearest note is F9, and it is 27 cents flat. A semitone is 100 cents, so that is about 27% of a semitone away.
Q. I cannot hear 11000 Hz — is something wrong?
This band is comfortable for most equipment and most ears, so check the volume and the output device first.
Q. What are the harmonics of 11000 Hz?
The whole-number multiples: 22000 Hz, 33000 Hz, 44000 Hz. An octave up is double, 22000 Hz; an octave down is half, 5500 Hz.
Nearby frequencies
Frequency doubles for every octave, so closeness is measured in ratios, not differences.