Håkansson B, Tjellström A, Rosenhall U
Acta Otolaryngol. 1985 Sep-Oct;100(3-4):240-52. doi: 10.3109/00016488509104786.
Some patients with hearing disorders cannot use a conventional air conduction hearing aid, but have to use a bone conduction hearing aid. The technique of introducing a permanent, skin-penetrating titanium implant has made it possible to develop a bone-anchored hearing aid with all parts in a single housing. Ten patients have been using such an aid for almost 2 years. This investigation deals with absolute acceleration threshold measurements in 7 of these patients. The measuring apparatus consisted mainly of a Békésy audiometer and an accelerometer, Brüel & Kjaer 4344. In the frequency range from 250 to 6 000 Hz, the acceleration levels at hearing threshold decreased by between 16 and 28 dB when measured directly on the titanium screw, as compared with when measured on the intact skin surface. This lowering in acceleration thresholds can be explained by the fact that skin and subcutaneous soft tissues act as a shunt for acceleration.
一些听力障碍患者无法使用传统的气导助听器，而必须使用骨导助听器。引入永久性、穿透皮肤的钛植入物的技术使得开发一种所有部件都在单个外壳中的骨锚式助听器成为可能。10名患者使用这种助听器已近2年。本研究对其中7名患者进行了绝对加速度阈值测量。测量仪器主要由一台贝凯西听力计和一个加速度计（Brüel & Kjaer 4344）组成。在250至6000Hz的频率范围内，与在完整皮肤表面测量相比，直接在钛螺钉上测量时，听阈处的加速度水平降低了16至28dB。加速度阈值的这种降低可以用皮肤和皮下软组织对加速度起分流作用这一事实来解释。
