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What does 7,000 Hz sound like?
7,000 Hz is a brilliance (air) frequency. It is a very high, thin, whistling tone. Sensitivity in this region falls with age, so younger listeners hear it much more clearly than older ones.
A 7,000 Hz sound wave completes 7,000 cycles every second, so one cycle lasts 143 µs. In air at 20 °C, where sound travels at about 343 m/s, each wave is 4.9 cm (1.93 in) long; in water it stretches to 21.2 cm because sound moves about 4.3 times faster there.
Musically, 7,000 Hz is 10 cents below A8 (7.04 kHz) in standard A440 tuning. Doubling it to 14,000 Hz raises the pitch by one octave; halving it to 3,500 Hz lowers it by one.
Wavelength of 7,000 Hz in different materials
| Medium | Speed of sound | Wavelength |
|---|---|---|
| Air (20 °C) | 343 m/s | 4.9 cm |
| Fresh water | 1,481 m/s | 21.2 cm |
| Seawater | 1,500 m/s | 21.4 cm |
| Helium | 1,007 m/s | 14.4 cm |
| Steel | 5,960 m/s | 85.1 cm |
| Glass | 5,640 m/s | 80.6 cm |
Harmonics and octaves
Real instruments playing 7,000 Hz also produce harmonics at whole-number multiples of the fundamental. Their relative strength gives each instrument its timbre.
Which animals can hear 7,000 Hz?
Can hear it
Humans, Dogs, Cats, Horses, Cows, Sheep, Pigs, Goats, Rabbits, Rats, Mice, Gerbils, Guinea pigs, Hedgehogs, Raccoons, Ferrets, Opossums, Chinchillas, Bats, Elephants, Beluga whales, Bottlenose dolphins, Canaries, Budgerigars (parakeets), Cockatiels, Owls, Greater wax moths
Frequently asked questions
What does 7,000 Hz sound like?
It is a very high, thin, whistling tone. Sensitivity in this region falls with age, so younger listeners hear it much more clearly than older ones.
Can humans hear 7,000 Hz?
Yes. 7,000 Hz is inside the typical human hearing range of 20 Hz to 20 kHz.
What musical note is 7,000 Hz?
7,000 Hz is 10 cents below A8, which is 7.04 kHz in standard A440 tuning.
What is the wavelength of 7,000 Hz?
About 4.9 cm in air at 20 °C and 21.2 cm in water.
Can dogs hear 7,000 Hz?
Yes – dogs hear roughly 67 Hz to 45,000 Hz.