Håkansson B, Tjellström A, Rosenhall U
Scand Audiol. 1984;13(1):3-13. doi: 10.3109/01050398409076252.
Some patients who need hearing aids are unable to use an aid which transmits the sound via the external ear canal but have to use a bone-conduction hearing aid. The pressure needed to apply the transducer often gives the patient discomfort, and the attenuating effect of the skin gives poor electroacoustical function of the aid. A permanent skin penetration has made it possible to develop a bone-anchored hearing aid with all components in one housing. Ten patients have been equipped with such an aid. This paper deals with a comparative hearing threshold measurement on 10 patients. Békésy audiometry was performed and a conventional Oticon (A-type) transducer was used. In the frequency range 600 to 6 000 Hz, there was a lowering of 10-20 dB in thresholds when skin penetration was performed. This lowering in thresholds means lower transducer distortion, lower electrical gain, and lower power consumption to produce a given sensation level.
一些需要助听器的患者无法使用通过外耳道传输声音的助听器，而必须使用骨传导助听器。应用换能器所需的压力常常会让患者感到不适，而且皮肤的衰减作用会使助听器的电声功能不佳。永久性的皮肤穿透使得开发一种所有部件都在一个外壳中的骨锚式助听器成为可能。已有10名患者配备了这种助听器。本文对10名患者进行了听力阈值的对比测量。采用了贝凯西测听法，并使用了传统的奥迪康（A型）换能器。在600至6000赫兹的频率范围内，进行皮肤穿透时阈值降低了10至20分贝。阈值的这种降低意味着换能器失真更低、电增益更低以及产生给定感觉水平时功耗更低。
