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What does 745 Hz sound like?
745 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 745 Hz sound wave completes 745 cycles every second, so one cycle lasts 1.34 ms. In air at 20 °C, where sound travels at about 343 m/s, each wave is 46.0 cm (1.51 ft) long; in water it stretches to 1.99 m because sound moves about 4.3 times faster there.
Musically, 745 Hz is 12 cents above F♯5 (739.99 Hz) in standard A440 tuning. Doubling it to 1,490 Hz raises the pitch by one octave; halving it to 372.5 Hz lowers it by one.
Wavelength of 745 Hz in different materials
| Medium | Speed of sound | Wavelength |
|---|---|---|
| Air (20 °C) | 343 m/s | 46.0 cm |
| Fresh water | 1,481 m/s | 1.99 m |
| Seawater | 1,500 m/s | 2.01 m |
| Helium | 1,007 m/s | 1.35 m |
| Steel | 5,960 m/s | 8.00 m |
| Glass | 5,640 m/s | 7.57 m |
Harmonics and octaves
Real instruments playing 745 Hz also produce harmonics at whole-number multiples of the fundamental. Their relative strength gives each instrument its timbre.
| Harmonic | Frequency | Nearest note |
|---|---|---|
| 1× (fundamental) | 745 Hz | F♯5 |
| 2× | 1.49 kHz | F♯6 |
| 3× | 2.235 kHz | C♯7 |
| 4× | 2.98 kHz | F♯7 |
| 5× | 3.725 kHz | A♯7 |
| 6× | 4.47 kHz | C♯8 |
| 7× | 5.215 kHz | E8 |
| 8× | 5.96 kHz | F♯8 |
Which animals can hear 745 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 745 Hz
Frequently asked questions
What does 745 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 745 Hz?
Yes. 745 Hz is inside the typical human hearing range of 20 Hz to 20 kHz.
What musical note is 745 Hz?
745 Hz is 12 cents above F♯5, which is 739.99 Hz in standard A440 tuning.
What is the wavelength of 745 Hz?
About 46.0 cm in air at 20 °C and 1.99 m in water.
Can dogs hear 745 Hz?
Yes – dogs hear roughly 67 Hz to 45,000 Hz.