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What does 990 Hz sound like?
990 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 990 Hz sound wave completes 990 cycles every second, so one cycle lasts 1.01 ms. In air at 20 °C, where sound travels at about 343 m/s, each wave is 34.6 cm (1.14 ft) long; in water it stretches to 1.50 m because sound moves about 4.3 times faster there.
Musically, 990 Hz is almost exactly B5 (987.77 Hz) in standard A440 tuning. Doubling it to 1,980 Hz raises the pitch by one octave; halving it to 495 Hz lowers it by one.
Wavelength of 990 Hz in different materials
| Medium | Speed of sound | Wavelength |
|---|---|---|
| Air (20 °C) | 343 m/s | 34.6 cm |
| Fresh water | 1,481 m/s | 1.50 m |
| Seawater | 1,500 m/s | 1.52 m |
| Helium | 1,007 m/s | 1.02 m |
| Steel | 5,960 m/s | 6.02 m |
| Glass | 5,640 m/s | 5.70 m |
Harmonics and octaves
Real instruments playing 990 Hz also produce harmonics at whole-number multiples of the fundamental. Their relative strength gives each instrument its timbre.
Which animals can hear 990 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 990 Hz
Frequently asked questions
What does 990 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 990 Hz?
Yes. 990 Hz is inside the typical human hearing range of 20 Hz to 20 kHz.
What musical note is 990 Hz?
990 Hz is almost exactly B5, which is 987.77 Hz in standard A440 tuning.
What is the wavelength of 990 Hz?
About 34.6 cm in air at 20 °C and 1.50 m in water.
Can dogs hear 990 Hz?
Yes – dogs hear roughly 67 Hz to 45,000 Hz.