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KMID : 1137820180390050183
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의공학회지
2018 Volume.39 No. 5 p.183 ~ p.187
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A Study on Frequency Characteristics According to the Output Transmission Method of Round Window Driving Middle Ear Implants
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Seong Ki-Woong
Shin Dong-Ho
Na Sung-Dae
Lee Jung-Hyun
Kim Myoung-Nam
Cho Jin-Ho
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Abstract
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In this paper, we investigated the efficiency according to the output transmission method of the round window driving type AMEIs (active middle ear implants) through the cadaveric experiment. For the experiment, we fabricated DRT (direct rod transducer) and FMT (floating mass transducer) type vibrational transducers based on our previous studies and conducted their output characteristics were measured. TCBT (tri-coil bellows transducer) and DFMT (differential floating mass transducer) were implemented with the same driving force and electrical characteristics as one of DRT and FMT, respectively. In the experiment using three human temporal bone, normal stapes vibration was measured with 1 Pa in front of tympanic membrane, and then was compared with each output of transducers. From the comparison, the DRT type vibration transducer was superior in overall energy transfer efficiency, especially in the low frequency range. There was no difference in implantation difficulty between the two transducers. The results of this study suggest that the DRT type vibrational transducer is more efficient and needs further study to overcome the low frequency degradation in round window approaching with FMT.
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KEYWORD
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FMT, DRT, Differential floating mass transducer, Tri-coil bellows transducer, Cadaveric experiment
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