Octave
When two pitched sounds are in a relationship such that the frequency of
one is twice that of the other (2:1)
, the
interval
is said to be an octave.
a doubling (2X) or halving (/2) of a frequency
Paradoxically, two sounds in an octave relationship sound as if they are the same pitch or unity (1:1) but with the doubled one sounding "higher." The same phenomena occurs with successive doublings of frequency as in 4:1, 8:1, etc.
octave
sine tone
220 hz and 440hz
pinetrees
normal
snake
up one octave
snake
down one ocatve