Sakamoto M, Sugasawa M, Kaga K, Kamio T
Department of Otolaryngology, Faculty of Medicine, University of Tokyo, Japan.
Scand Audiol. 1998;27(3):189-92. doi: 10.1080/010503998422728.
The sound-pressure thresholds at the extended high frequencies of 8-20 kHz were measured for 65 normal subjects aged between 10 and 69 years. The results are not unlike those obtained by previous investigators. The thresholds increased gradually as a function of frequency, except around 12 kHz and above 19 kHz, and also as a function of age. To clarify the connections between threshold, frequency and age, we introduced the regression lines for the threshold by analysing two ranges of frequencies (8-10 kHz and 14-19 kHz) and determining their slopes and intercepts. The regression line analysis reveals that the thresholds at 8-10 kHz tend to increase more at higher frequencies as subject age increased above 30 to 39 years, and those at 14-19 kHz increase translationally with increase of age. Our results did not contradict earlier reports on the pathological changes of the inner ear.
对65名年龄在10至69岁之间的正常受试者测量了8至20千赫扩展高频段的声压阈值。结果与先前研究者所得结果并无不同。阈值随频率逐渐增加，12千赫左右及19千赫以上除外，并且也随年龄增加。为了阐明阈值、频率和年龄之间的联系，我们通过分析两个频率范围（8至10千赫和14至19千赫）并确定其斜率和截距，引入了阈值的回归线。回归线分析表明，8至10千赫的阈值在受试者年龄超过30至39岁时，在较高频率下往往增加得更多，而14至19千赫的阈值则随年龄增加呈平移增加。我们的结果与早期关于内耳病理变化的报告并不矛盾。
