中耳压力变化对鼓膜脐部振动的影响。

Effects of middle ear pressure changes on umbo vibration.

作者信息

Gyo K, Goode R L

机构信息

Department of Otolaryngology, Ehime University, Japan.

出版信息

Auris Nasus Larynx. 1987;14(3):131-7. doi: 10.1016/s0385-8146(87)80013-5.

DOI:10.1016/s0385-8146(87)80013-5

PMID:3451732

Abstract

Effects of middle ear pressure changes on umbo vibration were studied in 5 fresh human temporal bones taken from cadavers. Umbo vibration to a constant sound pressure of 120 dB SPL at the tympanic membrane was measured with an MTI 1000 Fotonic Sensor. The results showed that there was a loss of umbo vibration at lower frequencies below 2 kHz; 5.0 +/- 1.0 dB loss at -100 mmH2O, 9.2 +/- 1.3 dB loss at -200 mmH2O, and 13.1 +/- 1.8 dB loss at -300 mmH2O. In contrast, there was a slight increase in umbo vibration at around 2-3 kHz. The effect was considered to be mainly due to increased stiffness of the tympanic membrane and decreased air volume in the middle ear cavity.

摘要

研究人员对取自尸体的5块新鲜人类颞骨进行了中耳压力变化对鼓膜脐部振动影响的研究。使用MTI 1000光子传感器测量鼓膜处120 dB SPL恒定声压下的鼓膜脐部振动。结果显示，在低于2 kHz的较低频率下存在鼓膜脐部振动损失；在-100 mmH2O时损失5.0 +/- 1.0 dB，在-200 mmH2O时损失9.2 +/- 1.3 dB，在-300 mmH2O时损失13.1 +/- 1.8 dB。相比之下，在2 - 3 kHz左右鼓膜脐部振动略有增加。这种效应被认为主要是由于鼓膜刚度增加和中耳腔内空气体积减少所致。