Spaeth J, Klimek L, Döring W H, Rosendahl A, Mösges R
Klinik für HNO-Heilkunde und plastische Kopf- und Halschirurgie, RWTH, Aachen.
HNO. 1993 Aug;41(8):385-8.
In the course of a clinical study we examined young men believed to have normal hearing. Volunteers with a positive history for noise deafness were excluded from further study. Normal hearing was verified by pure-tone audiometry if the hearing loss did not exceed 15 dB for each test tone between 250 Hz and 8000 Hz. As this limit is far below normative threshold values (DIN ISO 7029) we expected to find a large number of otological normal subjects. Using pure-tone audiometry, ABR and noise exposure, we found that 65% of the young male volunteers (mean age 25 years) did not meet the criteria for audiologic normality. The pure-tone thresholds for these subjects were comparable to the expected levels of their fathers' generation.
在一项临床研究过程中，我们检查了被认为听力正常的年轻男性。有噪声性耳聋阳性病史的志愿者被排除在进一步研究之外。如果在250赫兹至8000赫兹之间的每个测试音的听力损失不超过15分贝，则通过纯音听力测定法验证听力正常。由于这个限值远低于标准阈值（DIN ISO 7029），我们预计会发现大量耳科正常的受试者。通过使用纯音听力测定法、听性脑干反应（ABR）和噪声暴露，我们发现65%的年轻男性志愿者（平均年龄25岁）不符合听力正常的标准。这些受试者的纯音阈值与他们父亲那一代的预期水平相当。
