乐音、噪音是一对最基本、最常用的音乐术语。长期以来,在国内出版的诸多《基本乐理》著作中,对于乐音和噪音的定义多比较含糊,以卫星电视教育音乐教材《基本乐理》为例,其中对乐音和噪音的定义如下: “……根据物体振动时规则与否,音被分为‘乐音’和‘噪音’两大类。振动规则的,听起来音高十分明显的,叫做‘乐音’。如定音鼓、小提琴、二胡、琵琶、笛子、钢琴、风琴等乐器所发出的音,就都是乐音。振动不规则,听起来音高不明显的,叫做‘噪音’。如锣、鏺、军鼓、三角铁、木鱼等乐器所发出的音,就都是噪音”(李重光编著卫星电视教育音乐教材《基本乐理》上册第3页,高等教育出版社)。 Music, noise is a pair of the most basic and most commonly used musical terms. For a long time, the definition of music and noise in many “basic music theories” published in China is quite vague. Taking the basic music theory of satellite TV education music as an example, the definition of music and noise is as follows: “...... According to the rules of vibration when the object is or not, the sound is divided into two categories: ”tone“ and ”noise.“ Vibration rules, it sounds very clear pitch is called ”music.“ Such as timpani, violin, erhu, pipa, flute , Piano, organs and other musical instruments issued by the sound, it is the sound. Irregular vibration, sounds pitch is not obvious, is called ”noise.“ Such as gongs, bangs, snare drums, triangle iron, wooden fish and other musical instruments issued by the sound , Are all noise ”(edited by Li Chongguang satellite TV education music textbook“ Basic Music Theory ”on the third page, Higher Education Press).