English Dictionary

perfect fourth

noun

A musical interval of the Western twelve-semitone system consisting of five semitones and spanning four degrees of the diatonic scale. It is enharmonically equivalent to an augmented third.

I can play a perfect fourth on the piano.

意味（1）

A musical interval of the Western twelve-semitone system consisting of five semitones and spanning four degrees of the diatonic scale. It is enharmonically equivalent to an augmented third.

The perfect fourth has a pitch ratio close to 4:3.