Durrant J D, Hyre R
Department of Otolaryngology, University of Pittsburgh Medical Center, Pa.
Audiology. 1993 May-Jun;32(3):175-84. doi: 10.3109/00206099309072933.
An adaptation of the sensorineural acuity level procedure was employed to obtain thresholds under bone- (BC) vs. air-conducted (AC) white noise masking. For the BC masking condition, a Radioear B71 was placed on one mastoid. An Etymotic ER3 with a foam tip placed in the ear on the same side was used to deliver the pure-tone probe stimulus. This transducer was chosen to approximate the Telephonics TDH-39 earphone response characteristic while reducing occlusion effect. For the AC masking condition, the masker and probe were mixed electrically and delivered to the earphone. Masked threshold data, transformed into frequency response curves, demonstrated greater variance of BC vs. AC response across frequency but less high-frequency roll-off than expected from coupler measurements obtained using an artificial mastoid and 6-cm3 cavity, respectively.
采用一种改良的感觉神经性敏锐度水平程序来获取骨导（BC）与气导（AC）白噪声掩蔽下的阈值。在骨导掩蔽条件下，将一个Radioear B71置于一侧乳突上。在同侧耳朵中放置一个带有泡沫耳塞的Etymotic ER3来传递纯音探测刺激。选择该换能器是为了近似Telephonics TDH - 39耳机的响应特性，同时减少堵塞效应。在气导掩蔽条件下，掩蔽器和探测器进行电混合后通过耳机传递。将掩蔽阈值数据转换为频率响应曲线后发现，与使用人工乳突和6立方厘米声腔分别获得的耦合器测量结果相比，骨导与气导响应在频率上的差异更大，但高频滚降比预期的要小。
