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作者对美国洛杉矶House耳研所收集的65岁以上91人的151块颞骨及这些病例的病史和组织特征进行了研究,还查阅了上千份65岁以上病人的病历记录,将耳老化分为三类:(1)老年性聋,属生物学性耳老化,特征是纯音听力曲线2000Hz以内听力阈值低于15dB而2000Hz以上则高于25dB,语言辨别率优秀(92～100％)。耳蜗组织学检查示底转感觉神经结构退化。作者认为年龄在听觉系统中产生器质性变化是生物学特性,正如年龄在身体其他器
The authors studied 151 temporal bones of 91 people over the age of 65 and older collected from House Ear Institute in Los Angeles, United States, and examined their histories and histological features. They also reviewed thousands of records of patients over the age of 65 and classified ear aging as Three categories: (1) senile deafness, is a biological ear aging, characterized by pure tone hearing curve within 2000Hz hearing threshold below 15dB and over 2000Hz is higher than 25dB, excellent speech recognition rate (92 to 100%). Cochlear histological examination showed that the sensory neurons degenerated. Authors believe that age in the auditory system to produce organic changes in biological characteristics, just as age in the body of other devices