※ 引述《Keithl (the becoming)》之銘言：
: 一般人都是 BC threshold < AC threshold
共筆有這麼說嗎?
其實這個好像有爭議性(1)
另外Rinne test測量的其實目的就是比較AC BC 的sensitivity (threshold) (2)吧
而normal AC time > BC time的解釋另一個說法是AC經過middle ear 的amplication(3)
還有，關於氣骨導差(ABG)有些是認為要超過10dB，有些則認為要超過15dB才有臨床意義
1.http://www.asha.org/NR/rdonlyres/7A0B9989-1CF2-41B9-B442-7778CCDF1E4A/0/3709
_1.pdf
裡面提到:
1.in ANSI S3.42-1992, the current BC calibration standard, the introduction to
which states unequivocally that,“exact equivalence of air- and bone-conduction
thresholds cannot be expected.”
2.In summary, Mike, the occasional occurrence of BC thresholds poorer than AC
is not only possible, but, by virtue of the variability inherent in the measure-
ment process, it is to be expected.
2.http://ivertigo.net/vertigo/verhearing.html
3.http://www.entlink.net/education/curriculum/audiology.cfm2.
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※ 編輯: Juipeter 來自: 140.112.4.248 (03/28 12:49)