音感决不能仅限于对各别孤立单音的感能。对两个或两个以上的音群构成为纵向与横向的音响结构整体,也必须具有敏锐的感能。音在音乐中的使用与出现,往往遵照着一定的规律和音调习性,如一定的音阶、和弦、调式、调性等。为此,音乐教学中理应熟悉这些规律与习性。两个音构成为音程,音程的协和与否是首先需要思考的问题。对于什么是协和或不协和,不同时代、不同人的感受会有不同的判断与结论。从纯物理声学的角度来看,但凡发声频率的振动数成简单数字比的音程,就属于协和: Sound sense must not be limited to the isolated single tone of the flu. It is also necessary to have a keen sense to construct two or more sound groups as a whole in the vertical and horizontal acoustic structures. Tone in the use of music and appear, often in accordance with certain rules and tone habits, such as a certain scale, chords, style, tonality and so on. To this end, music teaching should be familiar with these laws and habits. Two tone structure for the interval, the harmony or not is the first question to consider. For what is the co-ordination or disharmony, different times, different people’s feelings there will be different judgments and conclusions. From a purely physical acoustical point of view, whenever the vibrational frequency of the vocal frequency is proportional to the simple digital scale, it belongs to Concord: