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What does 725 Hz sound like?
725 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 725 Hz sound wave completes 725 cycles every second, so one cycle lasts 1.38 ms. In air at 20 °C, where sound travels at about 343 m/s, each wave is 47.3 cm (1.55 ft) long; in water it stretches to 2.04 m because sound moves about 4.3 times faster there.
Musically, 725 Hz is 35 cents below F♯5 (739.99 Hz) in standard A440 tuning. Doubling it to 1,450 Hz raises the pitch by one octave; halving it to 362.5 Hz lowers it by one.
Wavelength of 725 Hz in different materials
| Medium | Speed of sound | Wavelength |
|---|---|---|
| Air (20 °C) | 343 m/s | 47.3 cm |
| Fresh water | 1,481 m/s | 2.04 m |
| Seawater | 1,500 m/s | 2.07 m |
| Helium | 1,007 m/s | 1.39 m |
| Steel | 5,960 m/s | 8.22 m |
| Glass | 5,640 m/s | 7.78 m |
Harmonics and octaves
Real instruments playing 725 Hz also produce harmonics at whole-number multiples of the fundamental. Their relative strength gives each instrument its timbre.
Which animals can hear 725 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 725 Hz
Frequently asked questions
What does 725 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 725 Hz?
Yes. 725 Hz is inside the typical human hearing range of 20 Hz to 20 kHz.
What musical note is 725 Hz?
725 Hz is 35 cents below F♯5, which is 739.99 Hz in standard A440 tuning.
What is the wavelength of 725 Hz?
About 47.3 cm in air at 20 °C and 2.04 m in water.
Can dogs hear 725 Hz?
Yes – dogs hear roughly 67 Hz to 45,000 Hz.