Mean pleasantness ratings for intervals ranging from the unison to the perfect fifth (P5) for synthetic complex tones (sCT, squares), saxophone recordings (Sax, diamonds) and voice recordings (Voice, circles).

The three intervals for which FFR were recorded (unison, m2 and P5) are marked in blue, green and red respectively. Error bars represent +/- standard error about the mean.

记录频率跟随反应（Frequency Following Response, FFR）的三个音程：纯一度（unison）、小二度（m2）与纯五度（P5），分别以蓝色、绿色和红色标识。误差棒代表均值的±标准误。