标准音高(Standard Pitch),是音乐中用作确定音高标准的。一个乐队,如果没有一个各种乐器所共同遵循的统一的定音标准的话,是无法实现合奏的。指定一个乐音,并以它的频率做为乐律定音的标准,这个乐音就是人们通常所泌的“标准音”。现代国际上通用的标准音,是振动频率为440赫兹的“a~1”音。我国古代在制定和统一标准音方面,曾做过许多尝试。自周代以后的每个朝代,都要进行一次制定乐律的工作。如,我国古代曾以黄钟管为标准音,规定“黄钟长九寸, Standard Pitch, used in music to determine pitch standards. A band can not achieve an ensemble unless it has the same standard of articulation that various instruments play. Assigning a musical tone and using its frequency as the standard of musical sounding is the “standard tone” that people usually excrete. The common standard tone in the modern world is “a ~ 1” sound with a vibration frequency of 440 Hz. In ancient China in the formulation and unification of standard sound, have done many attempts. Every dynasty since the Zhou dynasty had a work on the development of music. For example, in our country, Huang Zhong Guan was used as standard sound in ancient times, which stipulated that "