Lenhardt Martin L, Shulman Abraham, Goldstein Barbara A
Ceres Biotechnology, LLC, Program in Biomedical Engineering, Virginia Commonwealth University, Richmond, VA 23298-0168, USA.
Int Tinnitus J. 2007;13(2):81-6.
We assessed ultrasonic transmission in a dry skull; in a dry skull with water, simulating the living condition; in a cadaver head; and in six human subjects, one of whom exhibited no measurable hearing. By using these preparations, we concluded that fluid conduction is essential in the propagation of sound across the head, whereas the bone pathway is far less effective in that regard. Thus, there is little ear isolation beyond 10 dB even up to 80 kHz, extending the masking dilemma in cases of unilateral hearing loss.
我们评估了超声在干燥颅骨中的传播情况；在模拟活体状态的充满水的干燥颅骨中的传播情况；在尸体头部中的传播情况；以及在六名人类受试者中的传播情况，其中一名受试者没有可测量的听力。通过使用这些样本，我们得出结论，液体传导对于声音在头部的传播至关重要，而在这方面骨传导路径的效果要差得多。因此，即使在高达80千赫兹的频率下，超过10分贝的耳隔离也很少，这在单侧听力损失的情况下加剧了掩蔽难题。
