Keay D G, Murray J A
Department of Otolaryngology, Royal Infirmary, Edinburgh.
Clin Otolaryngol Allied Sci. 1988 Feb;13(1):31-5. doi: 10.1111/j.1365-2273.1988.tb00278.x.
A 5-year longitudinal study into hearing levels of 261 randomly selected elderly people was performed between 1968 and 1973. From 47 survivors, 37 subjects have been traced and their hearing retested with pure tone audiometry. The age range of those followed up was 80-85 years. The results indicate that the rate of hearing loss found after 5 years remained the same over the next 12 years. The deterioration rate is very much greater for the higher frequencies with losses of 1.89 dB annually at 6 KHz compared with 0.35 dB per annum for 1 KHz. The findings confirm that hearing loss continues steadily into the ninth decade, information previously not established.
1968年至1973年间，对261名随机选取的老年人的听力水平进行了一项为期5年的纵向研究。在47名幸存者中，已追踪到37名受试者，并通过纯音听力测定法对他们的听力进行了重新测试。随访对象的年龄范围为80至85岁。结果表明，5年后发现的听力损失率在接下来的12年中保持不变。高频听力损失的恶化率要高得多，6千赫兹时每年损失1.89分贝，而1千赫兹时每年损失0.35分贝。这些发现证实，听力损失在九十多岁时仍持续稳步发展，这一信息以前并未得到证实。
