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What does 625 Hz sound like?
625 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 625 Hz sound wave completes 625 cycles every second, so one cycle lasts 1.6 ms. In air at 20 °C, where sound travels at about 343 m/s, each wave is 54.9 cm (1.80 ft) long; in water it stretches to 2.37 m because sound moves about 4.3 times faster there.
Musically, 625 Hz is 8 cents above D♯5 (622.25 Hz) in standard A440 tuning. Doubling it to 1,250 Hz raises the pitch by one octave; halving it to 312.5 Hz lowers it by one.
Wavelength of 625 Hz in different materials
| Medium | Speed of sound | Wavelength |
|---|---|---|
| Air (20 °C) | 343 m/s | 54.9 cm |
| Fresh water | 1,481 m/s | 2.37 m |
| Seawater | 1,500 m/s | 2.40 m |
| Helium | 1,007 m/s | 1.61 m |
| Steel | 5,960 m/s | 9.54 m |
| Glass | 5,640 m/s | 9.02 m |
Harmonics and octaves
Real instruments playing 625 Hz also produce harmonics at whole-number multiples of the fundamental. Their relative strength gives each instrument its timbre.
Which animals can hear 625 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 625 Hz
Frequently asked questions
What does 625 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 625 Hz?
Yes. 625 Hz is inside the typical human hearing range of 20 Hz to 20 kHz.
What musical note is 625 Hz?
625 Hz is 8 cents above D♯5, which is 622.25 Hz in standard A440 tuning.
What is the wavelength of 625 Hz?
About 54.9 cm in air at 20 °C and 2.37 m in water.
Can dogs hear 625 Hz?
Yes – dogs hear roughly 67 Hz to 45,000 Hz.