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What does 555 Hz sound like?
555 Hz is a midrange frequency. It is a clear midrange tone, close to where the human ear does most of its work for speech and melody.
A 555 Hz sound wave completes 555 cycles every second, so one cycle lasts 1.8 ms. In air at 20 °C, where sound travels at about 343 m/s, each wave is 61.8 cm (2.03 ft) long; in water it stretches to 2.67 m because sound moves about 4.3 times faster there.
Musically, 555 Hz is almost exactly C♯5 (554.37 Hz) in standard A440 tuning. Doubling it to 1,110 Hz raises the pitch by one octave; halving it to 277.5 Hz lowers it by one.
Wavelength of 555 Hz in different materials
| Medium | Speed of sound | Wavelength |
|---|---|---|
| Air (20 °C) | 343 m/s | 61.8 cm |
| Fresh water | 1,481 m/s | 2.67 m |
| Seawater | 1,500 m/s | 2.70 m |
| Helium | 1,007 m/s | 1.81 m |
| Steel | 5,960 m/s | 10.74 m |
| Glass | 5,640 m/s | 10.16 m |
Harmonics and octaves
Real instruments playing 555 Hz also produce harmonics at whole-number multiples of the fundamental. Their relative strength gives each instrument its timbre.
| Harmonic | Frequency | Nearest note |
|---|---|---|
| 1× (fundamental) | 555 Hz | C♯5 |
| 2× | 1.11 kHz | C♯6 |
| 3× | 1.665 kHz | G♯6 |
| 4× | 2.22 kHz | C♯7 |
| 5× | 2.775 kHz | F7 |
| 6× | 3.33 kHz | G♯7 |
| 7× | 3.885 kHz | B7 |
| 8× | 4.44 kHz | C♯8 |
Which animals can hear 555 Hz?
Can hear it
Humans, Dogs, Cats, Horses, Cows, Sheep, Pigs, Goats, Rabbits, Rats, Gerbils, Guinea pigs, Hedgehogs, Raccoons, Ferrets, Opossums, Chinchillas, Elephants, Bottlenose dolphins, Chickens, Canaries, Budgerigars (parakeets), Cockatiels, Owls, Bullfrogs, Tree frogs, Goldfish, Catfish, Tuna
Cannot hear it
Instruments and voices that can play 555 Hz
Frequently asked questions
What does 555 Hz sound like?
It is a clear midrange tone, close to where the human ear does most of its work for speech and melody.
Can humans hear 555 Hz?
Yes. 555 Hz is inside the typical human hearing range of 20 Hz to 20 kHz.
What musical note is 555 Hz?
555 Hz is almost exactly C♯5, which is 554.37 Hz in standard A440 tuning.
What is the wavelength of 555 Hz?
About 61.8 cm in air at 20 °C and 2.67 m in water.
Can dogs hear 555 Hz?
Yes – dogs hear roughly 67 Hz to 45,000 Hz.