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| {{About|the psychoacoustic phenomenon of different pitches sounding similar|using multiple names for the same pitch in notation|enharmonic equivalence}}
| | #REDIRECT [[2/1#Octave_equivalence]] |
| {{Wikipedia| Octave #Equivalence }}
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| '''Equivalence''' is the phenomenon of psychoacoustics that two notes an [[octave]] apart are considered substantially similar to the brain. The question of whether it can (and should) generalize or generalizes to other intervals is still being studied. This question relates to the [[height]] of the interval's denominator in the (odd) harmonic series and another phenomenon presumably of psycho-acoustics that melodies within the range of a tenth are considered to sound "cohesive" or "coherent" to the brain. If equivalence can be perceived for other intervals, the best candidates are those of very high [[Consonance and dissonance|consonance]], such as [[3/1]], the next harmonic after the octave.
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| The set of all equivalent pitches is a [[pitch class]].
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| == See also ==
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| * [[Equave]]
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| [[Category:Psychoacoustics]]
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| [[Category:Terms]]
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| {{todo|expand}}
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