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# Notes, Octaves and Frequencies

## Frequencies vs. notes and octaves.

The notes below are for a tempered chromatic scale where A = 440 Hz.

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Frequency (Hz)
listen to the sound! - touch and click the frequency below!
OctaveNote
C C# D Eb E F F# G G# A Bb B
0 16.35 17.32 18.35 19.45 20.60 21.83 23.12 24.50 25.96 27.50 29.14 30.87
1 32.70 34.65 36.71 38.89 41.20 43.65 46.25 49.00 51.91 55.00 58.27 61.74
2 65.41 69.30 73.42 77.78 82.41 87.31 92.50 98.00 103.8 110.0 116.5 123.5
3 130.8 138.6 146.8 155.6 164.8 174.6 185.0 196.0 207.7 220.0 233.1 246.9
4 261.6 277.2 293.7 311.1 329.6 349.2 370.0 392.0 415.3 440.0 466.2 493.9
5 523.3 554.4 587.3 622.3 659.3 698.5 740.0 784.0 830.6 880.0 932.3 987.8
6 1047 1109 1175 1245 1319 1397 1480 1568 1661 1760 1865 1976
7 2093 2217 2349 2489 2637 2794 2960 3136 3322 3520 3729 3951
8 4186 4435 4699 4978 5274 5588 5920 6272 6645 7040 7459 7902

The wavelength depends on the speed of sound and can be calculated as

λ = c / f           (2)

where

λ =  wavelength (m)

cspeed of sound (m/s)

f = frequency (s-1, Hz)

Sound velocity depends on the density of the air and the air temperature. Typical value for speed of sound is 343 m/s for temperature 20oC.

### Guitar Strings

NoteOctaveFrequency
(Hz)
E 2 82.41
A 2 110.0
D 3 146.8
G 3 196.0
B 3 246.9
E 4 329.6

## Related Topics

• Acoustics - Room acoustics and acoustic properties, decibel A, B and C, Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity and sound attenuation.

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Temperature

oC
oF

Length

m
km
in
ft
yards
miles
naut miles

Area

m2
km2
in2
ft2
miles2
acres

Volume

m3
liters
in3
ft3
us gal

Weight

kgf
N
lbf

Velocity

m/s
km/h
ft/min
ft/s
mph
knots

Pressure

Pa (N/m2)
bar
mm H2O
kg/cm2
psi
inches H2O

Flow

m3/s
m3/h
US gpm
cfm

1 27