Experimental assessment of the performance of an electromagnetic hearing aid in human temporal bones
Experimental assessment of the performance of an electromagnetic hearing aid in human temporal bones
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DOI：
10.1299/jsmec.48.529
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发表时间：
2005-12-01
期刊：
影响因子：
--
通讯作者：
Wada, H
中科院分区：
文献类型：
--
作者：
Hamanishi, S;Koike, T;Wada, H
为了避免传统助听器中固有的一些问题，例如由于声反馈导致的高频下的低增益、外耳道阻塞的不适等，在过去二十年中已经开发了植入式助听器。植入式助听器最突出的特点是换能器直接耦合到中耳听小骨之一。然而，由于植入这些助听器需要侵入性手术，因此它们尚未被广泛使用。因此，我们构建了一个原型的非植入式助听器，它主要由一个麦克风放大器系统和一个电磁换能器在我们以前的研究开发。它可以通过附着在鼓膜上的线圈产生激振力来振动听小骨。在这项研究中，使用人类颞骨评估了该助听器产生的激振力。使用三块骨头的实验的最佳结果表明，新开发的助听器可以在0.8至3.2 kHz之间的频率下产生超过80 dB SPL的声压激励力。
To circumvent some of the problems inherent in conventional hearing aids such as low gain at high frequencies due to acoustic feedback, discomfort in occlusion of the external ear canal and so on, implantable hearing aids have been developed over the past two decades. The most prominent feature of implantable hearing aids is that a transducer is directly coupled to the one of the middle-ear ossicles. However, since invasive surgery is necessary for implantation of these hearing aids, they have not as yet been widely employed. We therefore constructed a prototype of a non-implantable hearing aid which is mainly composed of a microphone amplifier system and an electromagnetic transducer developed in our previous study. It can generate an excitation force to vibrate the ossicles by a coil adhered to the tympanic membrane. In this study, the excitation force generated by this hearing aid was evaluated using human temporal bones. The best result of experiments using three bones indicates that the newly developed hearing aid can generate an excitation force of more than 80 dB SPL in terms of sound pressure at frequencies between 0.8 and 3.2 kHz.