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What does 261.63 Hz sound like?
261.63 Hz is a low midrange frequency. It sits in the low midrange: a rounded, full tone in the region of male and female speaking voices and the lower notes of a piano.
A 261.63 Hz sound wave completes 261.63 cycles every second, so one cycle lasts 3.82 ms. In air at 20 °C, where sound travels at about 343 m/s, each wave is 1.31 m (4.30 ft) long; in water it stretches to 5.66 m because sound moves about 4.3 times faster there.
Musically, 261.63 Hz is almost exactly C4 (261.63 Hz) in standard A440 tuning. Doubling it to 523.26 Hz raises the pitch by one octave; halving it to 130.815 Hz lowers it by one.
Wavelength of 261.63 Hz in different materials
| Medium | Speed of sound | Wavelength |
|---|---|---|
| Air (20 °C) | 343 m/s | 1.31 m |
| Fresh water | 1,481 m/s | 5.66 m |
| Seawater | 1,500 m/s | 5.73 m |
| Helium | 1,007 m/s | 3.85 m |
| Steel | 5,960 m/s | 22.78 m |
| Glass | 5,640 m/s | 21.56 m |
Harmonics and octaves
Real instruments playing 261.63 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) | 261.63 Hz | C4 |
| 2× | 523.26 Hz | C5 |
| 3× | 784.89 Hz | G5 |
| 4× | 1.047 kHz | C6 |
| 5× | 1.308 kHz | E6 |
| 6× | 1.57 kHz | G6 |
| 7× | 1.831 kHz | A♯6 |
| 8× | 2.093 kHz | C7 |
Which animals can hear 261.63 Hz?
Can hear it
Humans, Dogs, Cats, Horses, Cows, Sheep, Pigs, Goats, Rats, Gerbils, Guinea pigs, Hedgehogs, Raccoons, Ferrets, Chinchillas, Elephants, Bottlenose dolphins, Chickens, Canaries, Budgerigars (parakeets), Cockatiels, Owls, Bullfrogs, Tree frogs, Goldfish, Catfish, Tuna
Cannot hear it
Rabbits, Mice, Opossums, Bats, Beluga whales, Greater wax moths
Instruments and voices that can play 261.63 Hz
- Piano (88 keys)
- Guitar (standard tuning)
- Bass guitar (4-string)
- Violin
- Viola
- Cello
- Double bass
- Harp
- Flute
- Clarinet (B♭, sounding)
- Oboe
- Bassoon
- Alto saxophone (sounding)
- Tenor saxophone (sounding)
- Trumpet (B♭, sounding)
- French horn (sounding)
- Trombone
- Tuba
- Bass voice
- Baritone voice
- Tenor voice
- Alto voice
- Mezzo-soprano voice
- Soprano voice
Frequently asked questions
What does 261.63 Hz sound like?
It sits in the low midrange: a rounded, full tone in the region of male and female speaking voices and the lower notes of a piano.
Can humans hear 261.63 Hz?
Yes. 261.63 Hz is inside the typical human hearing range of 20 Hz to 20 kHz.
What musical note is 261.63 Hz?
261.63 Hz is almost exactly C4, which is 261.63 Hz in standard A440 tuning.
What is the wavelength of 261.63 Hz?
About 1.31 m in air at 20 °C and 5.66 m in water.
Can dogs hear 261.63 Hz?
Yes – dogs hear roughly 67 Hz to 45,000 Hz.