Cook J A, Krishnan S, Fagan P A
Scottish Hospital, Sydney, Australia.
Clin Otolaryngol Allied Sci. 1995 Jun;20(3):258-61. doi: 10.1111/j.1365-2273.1995.tb01862.x.
The Carhart effect consists of a depression in bone conduction thresholds in the presence of a conductive hearing loss. However, the mathematical relationship between the degree of conductive hearing loss and the degree of depression of bone conduction has not before been described. We have reviewed pre- and post-operative pure-tone audiograms performed on 102 consecutive patients having stapedectomy in an attempt to identify relationships between changes in bone conduction and air conduction and air-bone gap closure. Significant linear relationships were found between bone conduction and air conduction at 0.5. 1, 2 & kHz. Bone conduction was linearly related to air bone gap closure at 2 kHz.
卡哈特效应表现为在存在传导性听力损失的情况下骨导阈值降低。然而，传导性听力损失程度与骨导降低程度之间的数学关系此前尚未被描述。我们回顾了102例连续接受镫骨切除术患者的术前和术后纯音听力图，试图确定骨导和气导变化与气骨导间距缩小之间的关系。发现在0.5、1、2和4千赫时骨导和气导之间存在显著的线性关系。在2千赫时骨导与气骨导间距缩小呈线性相关。
