claim: Blank Space originated in Austria.
evidence: In electronics , an octave is a doubling or halving of a frequency .. electronics. electronics. frequency. frequency. octave. octave. The term is derived from the Western musical scale -LRB- an octave is a doubling in frequency -RRB- and is therefore common in audio electronics .. electronics. electronics. frequency. frequency. octave. octave. -LRB- The prefix octa - , denoting eight , refers to the eight notes of a diatonic scale , but can be confusing in the context of physics , as the association of the word and the physical relation is solely a matter of customary usage . -RRB-. diatonic scale. Diatonic and chromatic. Along with the decade , it is a unit used to describe frequency bands or frequency ratios .. frequency. frequency. decade. decade ( log scale ). unit. units of measurement. frequency bands. frequency. frequency ratios. interval ratio. A frequency ratio expressed in octaves is the base-2 logarithm -LRB- binary logarithm -RRB- of the ratio  :. frequency. frequency. logarithm. logarithm. binary logarithm. binary logarithm. An amplifier or filter may be stated to have a frequency response of ± 6dB per octave over a particular frequency range , which signifies that the power gain changes by ± 6 decibels -LRB- a factor of 4 in power -RRB- , when the frequency changes by a factor of 2 .. frequency. frequency. octave. octave. decibels. decibels. This slope , or more precisely decibels per octave , corresponds to an amplitude gain proportional to frequency , which is equivalent to ± 20dB per decade -LRB- factor of 10 amplitude gain change for a factor of 10 frequency change -RRB- .. frequency. frequency. octave. octave. decade. decade ( log scale ). decibels. decibels. This would be a first-order filter .. first-order filter. first-order filter