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What does 660 Hz sound like?
660 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 660 Hz sound wave completes 660 cycles every second, so one cycle lasts 1.52 ms. In air at 20 °C, where sound travels at about 343 m/s, each wave is 52.0 cm (1.71 ft) long; in water it stretches to 2.24 m because sound moves about 4.3 times faster there.
Musically, 660 Hz is almost exactly E5 (659.26 Hz) in standard A440 tuning. Doubling it to 1,320 Hz raises the pitch by one octave; halving it to 330 Hz lowers it by one.
Wavelength of 660 Hz in different materials
| Medium | Speed of sound | Wavelength |
|---|---|---|
| Air (20 °C) | 343 m/s | 52.0 cm |
| Fresh water | 1,481 m/s | 2.24 m |
| Seawater | 1,500 m/s | 2.27 m |
| Helium | 1,007 m/s | 1.53 m |
| Steel | 5,960 m/s | 9.03 m |
| Glass | 5,640 m/s | 8.55 m |
Harmonics and octaves
Real instruments playing 660 Hz also produce harmonics at whole-number multiples of the fundamental. Their relative strength gives each instrument its timbre.
Which animals can hear 660 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 660 Hz
Frequently asked questions
What does 660 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 660 Hz?
Yes. 660 Hz is inside the typical human hearing range of 20 Hz to 20 kHz.
What musical note is 660 Hz?
660 Hz is almost exactly E5, which is 659.26 Hz in standard A440 tuning.
What is the wavelength of 660 Hz?
About 52.0 cm in air at 20 °C and 2.24 m in water.
Can dogs hear 660 Hz?
Yes – dogs hear roughly 67 Hz to 45,000 Hz.