Semitone scale
| STUB |
| CAT | This article needs proper categorization. You can help Glottopedia by categorizing it Please do not remove this block until the problem is fixed. |
Twelve semitones form one octave, which is defined as a doubling of the fundamental frequency. As the human auditory system perceives tones in a logarithmic way (instead of in a linear way), the logarithmic semitone scale is a more appropriate measure of the perceptual consequences of differences in fundamental frequency. The following conversion transforms frequency (F) values into semitones (ST):
ST=39.87*log(F/50)
