Mechanical, acoustic and electromagnetic evaluation of the semi-implantable middle ear hearing device (SIMEHD).
Ear, nose, & throat journal(1997)
摘要
The properties of the partially implantable middle ear hearing device (SIMEHD) were extensively studied. The internal unit was subjected to 5,000 cycles of bending at a force of 75 g (gravity) without failure. An accurate measurement of the force output of the SIMEHD was obtained (14-25 dynes/mA). This force is too small to cause any damage to the ossicular chain. The force resulting from electromagnetic interference over a wide frequency range (500 khz -1 Giga (10(9)) Hz) was measured and noted to be within the margin of safety. The frequency response plots (500-8,000 Hz) were also obtained and revealed an excellent ability to amplify middle and high-frequency sounds.
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关键词
ear,acoustic,hearing,electromagnetic evaluation,semi-implantable
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