差さ音おん

noun

difference tone

Technical term in physics and music for a tone whose frequency is the difference between two simultaneously sounded tones. Often contrasted with 加音 (summation tone).

See also: 加音

• 差さ音おんは、二ふたつの音おとの周しゅう波は数すうの差さに等ひとしい周しゅう波は数すうを持もつ音おととして知ち覚かくされる。

  A difference tone is perceived as a sound whose frequency equals the difference between the frequencies of two tones.