Kringlebotn M
Department of Physics, Norwegian University of Science and Technology, Trondheim.
Ann Otol Rhinol Laryngol. 2000 Oct;109(10 Pt 1):940-4. doi: 10.1177/000348940010901007.
The rupture pressures of the tympanic membrane, Reissner's membrane, the round window membrane, and the annular ligament have all been measured in cadaver ears from Norwegian cattle. For the tympanic membrane, a static overpressure was applied to the ear canal; for Reissner's membrane, to the endolymph; and for the round window membrane, to the perilymph. The rupture pressure of the annular ligament equals the rupture force to the footplate divided by the area of the oval window. The mean rupture pressures are 0.39 atm for the tympanic membrane, 0.047 atm for Reissner's membrane, greater than 2 atm for the round window membrane, and 29.4 atm for the annular ligament. This last pressure corresponds to 0.68 kilogram force applied to the footplate. The ruptures of the tympanic membrane appeared without exception as small tears in the pars flaccida. The rupture pressure of the tympanic membrane was also measured in a few ears from foxes.
人们已经对挪威牛尸体耳朵的鼓膜、Reissner膜、圆窗膜和环状韧带的破裂压力进行了测量。对于鼓膜，向耳道施加静态超压；对于Reissner膜，向内淋巴施加；对于圆窗膜，向外淋巴施加。环状韧带的破裂压力等于作用于镫骨底板的破裂力除以卵圆窗的面积。鼓膜的平均破裂压力为0.39个大气压，Reissner膜为0.047个大气压，圆窗膜大于2个大气压，环状韧带为29.4个大气压。最后这个压力相当于作用于镫骨底板的0.68千克力。鼓膜破裂无一例外都表现为松弛部的小撕裂。还对几只狐狸耳朵的鼓膜破裂压力进行了测量。
