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作者在高海拔地区（２４５０米、大气压７５．６６ｋＰａ、氧分压１５．８９ｋＰａ）对藏及土族老年人１１３例（２２３耳）进行了纯音听力测试和头发中三种微量元素锌（Ｚｎ）、铬（Ｃｒ）、铜（Ｃｕ）的测定。结果：各年龄组纯音听力中骨传导听阈较气传导听阈低１０ｄＢ以上，以７０～７９岁组明显（ｐ＜０．０１），年龄与语言频率听阈呈正相关（ｎ＝１１３、ｒ＝０．４８２６、ｐ＜０．０１）；锌与听阈呈负相关（ｎ＝１１３、ｒ＝－０．２９９４、ｐ＜０．０１）；铬与听阈呈正相关（ｎ＝１１３、ｒ＝０．３３４３、ｐ＜０．０１）；铜与听阈无相关性（ｎ＝１１３、ｒ＝－０．０６２、ｐ＞０．５０）。
The authors performed pure tone audiometry and hair Zn, Zn and Zn in 113 cases (223 ears) of Tibetan and Tu nationality elderly at high altitudes (2450 meters, atmospheric pressure 75.66 kPa, oxygen partial pressure 15.89 kPa) Chromium (Cr), copper (Cu) determination. Results: The bone conduction threshold of pure tone hearing in all age groups was lower than that of the air conduction threshold by 10 dB or more, and was significantly higher in the age group of 70-79 years (p <0.01). There was a positive correlation between age and language frequency threshold (n = 113, r = (N = 113, r = -0.2994, p <0.01). There was a positive correlation between chromium and hearing threshold (n = 113, r = 0.3343, p <0.01). There was no correlation between copper and hearing threshold (n = 113, r = -0.062, p> 0.50).