Completely-in-the-Canal Magnet-Drive Hearing Device: A Temporal Bone Study
Completely-in-the-Canal Magnet-Drive Hearing Device: A Temporal Bone Study
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DOI：
10.1177/0194599812471608
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发表时间：
2013-03-01
影响因子：
3.4
通讯作者：
Djalilian, Hamid R.
中科院分区：
文献类型：
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作者：
Mahboubi, Hossein;Malley, Melinda J. D.;Djalilian, Hamid R.
磁力驱动助听器(MHD)是一种小型的完全在管内的助听器原型，它通过磁性接口驱动鼓膜(TM)。制作了身体的颞骨标本。MHD被连接到粘在Umbo上的环氧镍颗粒上。在0.3到10 kHz之间进行频率扫描，并用不同水平的电流驱动MHD。用激光多普勒测振仪测量距骨后小腿的位移，并与声诱发的位移进行比较。磁流体具有线性的频率响应和低的总谐波失真。小球的放置改变了距骨的运动；然而，这些变化在统计学上并不显著。100 mV和300 mV的输入产生的位移分别相当于70和80分贝声压级下的自然声的位移。这种使用磁性接口的新型设备与UMBO的耦合具有比空气传导设备更宽的频率输出，其致动器在驱动TM方面是有效的。
The magnet-drive hearing device (MHD) is a small completely-in-the-canal hearing aid prototype that drives the tympanic membrane (TM) through a magnetic interface. A cadaveric temporal bone was prepared. The MHD was coupled to a nickel-epoxy pellet glued to the umbo. Frequency sweeps between 0.3 and 10 kHz were performed, and the MHD was driven with various levels of current. Displacements of the posterior crus of the stapes were measured using a laser Doppler vibrometer and compared with sound-induced displacements. The MHD had a linear frequency response and low total harmonic distortion. The pellet placement altered the stapes movements; however, the changes were statistically insignificant. Inputs of 100 and 300 mV produced displacements equivalent to those of the natural sound at 70- and 80-dB sound pressure level, respectively. The coupling of this novel device using a magnetic interface to the umbo had a frequency output wider than air conduction devices, and its actuator was effective in driving the TM.