Pitch represents the perceived frequency of a sound. Pitch is used in musical context, while frequency in technical. Note is also musical term. Note is sound with frequency that is not generic, but one from scale. For example Middle A is the 440 Hz. All other A's will be 440 * 2 ^ x. The series: .. 110, 220, 440, 880.. (A's in all octaves) form Pitch class.
A musical tone is a steady periodic sound. A musical tone is characterized by its duration, pitch, intensity (or loudness), and timbre (or quality).
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音调代表声音的感知频率。音调用于音乐环境，而频率用于技术。音符也是音乐术语。音符是具有非通用频率的声音，而是音阶频率的声音。例如，中 A 是 440 Hz。所有其他 A 将为
440 * 2 ^ x。该系列：.. 110、220、440、880..（所有八度音阶均为 A）构成音高等级。Pitch represents the perceived frequency of a sound. Pitch is used in musical context, while frequency in technical. Note is also musical term. Note is sound with frequency that is not generic, but one from scale. For example Middle A is the 440 Hz. All other A's will be
440 * 2 ^ x. The series: .. 110, 220, 440, 880.. (A's in all octaves) form Pitch class.频率（技术）= 音调（音乐）
音符 = 音调
概念解释：频率、波长和音高 以及此处：< a href="http://entertainment.howstuffworks.com/guitar2.htm" rel="nofollow">原声吉他的工作原理。
维基百科也是你的朋友。
Frequency (technical) = Pitch (music)
Musical Note = Tone
An explanation of the concepts: Frequency, Wavelength, and Pitch and here: How Acoustic Guitars Work.
Also Wikipedia is your friend.