...so I have found a close explanation for "octave" (倍频程). 倍频程: 倍頻程是指兩個頻率之比為...machine. The reason people want to study "third-octave-mode" is because it causes the most damage...
She plays the piano in rhythm and on key 她彈鋼琴時的音調及旋律準確 she is in the same octave as the student 她的八度音域和那個學生很像
...register 凱莉 = Mariah Carey Utilizing her five-octave broad vocal range and her trademark "whistle register" singing...