Octave
An octave is the interval between two points where the frequency at the second point is twice the frequency of the first.
Octave Center Frequency (Hz) |
31.25 | 62.5 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 | 16000 |
Wavelength in air (70oF, 21oC) (ft) |
17.92 | 9.03 | 4.52 | 2.26 | 1.129 | 0.56 | 0.28 | 0.14 | ||
Wavelength in air (70oF, 21oC) (m) |
5.46 | 2.75 | 1.38 | 0.69 | 0.34 | 0.17 | 0.085 | 0.043 |
Although the octave is the eighth note of a series in any key - an octave is separated by 5 whole notes and 2 halfnotes.