# Template:Frequency and Pitch

esse quam videri

## Frequency and Pitch

Frequency if the measure of how many cycles a wave complete per second.

Frequency (f) is measures in Hertz

Period (T) in the inverse of infrequency is is measured in seconds

Frequency = Cycles/Second Perdiod = Seconds/Cycle

f = 1/T T = 1/f

The perception is frequency is know as pitch.

### Intervals

An octave is doubling of the frequency.

ie 440 Hz is an A

the next A after 440 Hz is 880 Hz

In westen music the octave is divided into 12 semi-tones

http://thinkzone.wlonk.com/Music/12Tone.htm

http://en.wikipedia.org/wiki/Interval_(music)

http://www.musicalintervalstutor.com/

http://www.keystrokepublishing.com/html/sight_singing_tips.html