Gyo K, Goode R L, Miller C
Arch Otolaryngol Head Neck Surg. 1987 Oct;113(10):1078-81. doi: 10.1001/archotol.1987.01860100056021.
The function of the output transducer of an implantable hearing aid was assessed by applying it to the stapes head in seven fresh human cadaver temporal bones while observing vibration of the stapes under a microscope with the use of a stroboscope and a video measuring system. The transducer was a 5 X 1.2 X 0.6-mm piezoelectric ceramic bimorph with attached metal holder. Transmission changed with the amount of force holding the transducer tip on the head of the stapes. An optimal connection between the vibrator and stapes produced better transmission than a tight or loose connection. Gluing the connection with cyanoacrylate cement decreased transmission in the optimal connection, produced no change in the tight connection, and improved transmission in the loose connection. Comparison of stapes displacement produced by the vibrator at 1 kHz with that produced by normal middle-ear sound transmission revealed that the vibrator-induced stapes displacement for a 1 V peak-to-peak input was equivalent to that produced by a sound stimulus of 90-dB sound pressure level at the tympanic membrane.
通过将植入式助听器的输出换能器应用于七具新鲜人类尸体颞骨的镫骨头，同时使用频闪仪和视频测量系统在显微镜下观察镫骨的振动，对该换能器的功能进行了评估。该换能器是一个5×1.2×0.6毫米的压电陶瓷双压电晶片，并带有金属支架。传输随将换能器尖端固定在镫骨头上的力的大小而变化。振动器与镫骨之间的最佳连接比紧密或松散连接产生更好的传输效果。用氰基丙烯酸酯胶粘合连接在最佳连接中会降低传输，在紧密连接中无变化，而在松散连接中会改善传输。将振动器在1千赫时产生的镫骨位移与正常中耳声音传输产生的镫骨位移进行比较，结果显示，对于1伏峰峰值输入，振动器引起的镫骨位移相当于鼓膜处90分贝声压级的声音刺激所产生的位移。
