An implantable piezoelectric hearing aid transducer for sensorineural hearing loss .2. Clinical implant
An implantable piezoelectric hearing aid transducer for sensorineural hearing loss .2. Clinical implant
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DOI：
10.1007/s001060050159
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发表时间：
1997-10-01
期刊：
影响因子：
0.9
通讯作者：
Zenner, HP
中科院分区：
文献类型：
--
作者：
Leysieffer, H;Baumann, JW;Zenner, HP
基于本文第1部分所述的植入式压电助听器换能器原型，在几个临床和技术迭代步骤中开发和制造了一种微型密封植入物。传感器由纯钛（医用级2，ASTM F67）制成，设计用于植入乳突腔。机械振动到中耳中的听小骨的传递通过纯钛的固定的直接耦合杆或经由合适的耦合元件来实现。根据动态质量负载，传感器被高度调谐，谐振频率在7-10 kHz范围内。在该谐振以下以及低至低频时，伸长的频率响应是平滑的，具有小于+/-1 dB的非常小的涟漪。与原型不同，在相当的功耗下，实现了约10 dB的振动幅度增加。低频和中频的振动幅度约为60 nm，换能器电压为1 V，对应于高达1 kHz时约100 dB SPL的等效声压级。在高达10 kHz的较高频率下，输出电平增加到130 dB SPL以上。最大音量（1 V）时的非线性失真极小（THD
A miniature, hermetically sealed implant was development and manufactured in several clinical and technical iteration steps based on the prototype of an implantable piezoelectric hearing-aid transducer described in Part 1 of the work presented here. The transducer is made of pure titanium (medical grade 2, ASTM F67) and designed to be implanted into the mastoid cavity. Transfer of mechanical oscillations to an ossicle in the middle ear is effected by a fixed directly coupling rod of pure titanium or via suitable coupling elements. The transducer is highly tuned with a resonance frequency in the range of 7-10 kHz, depending on the dynamic mass load. Below this resonance and down to low frequencies, the frequency response of elongation is smooth with a very small ripple of less than +/-1 dB. Unlike the prototype, an increase in vibration amplitude of around 10 dB was achieved for a comparable power consumption. Vibration amplitude at low and middle frequencies is about 60 nm with a transducer voltage of 1 V, corresponding to an equivalent sound-pressure level of around 100 dB SPL at up to 1 kHz. At higher frequencies of up to 10 kHz, the output level increases to beyond 130 dB SPL. Nonlinear distortions at maximum Volume (1 V) are extremely small (THD