In Western music, notes that are exactly one octave apart:
A) have the same fundamental frequency.
B) have different sound qualities.
C) have similar sound qualities.
D) cause dissonance.

Question

Quizplus · Accepted Answer

Notes that are exactly one octave apart have similar sound qualities because they share a fundamental frequency ratio of 2:1, which makes them harmonically compatible and perceived as similar in character.

In Western Music, Notes That Are Exactly One Octave Apart