A new incus-body driving type transducer relying on piezoelectric stack, with broad frequency bandwidth, is proposed for use\nin a middle ear implant. To aid the design process of this transducer, a coupling biomechanical model of the human middle ear\nand the piezoelectric transducer was established by reverse engineering technology. The validity of this model was confirmed by\ncomparing model predicted motions with experimental measurements. Based on this verified biomechanical model, the main\nparameters of the transducer were determined. And its power consumption was calculated. Finally, to verify the capability of the\ndesigned piezoelectric transducer, a human temporal bone experimental platform was built. And the dynamic characteristics and\nthe stimulated performance of the piezoelectric transducer were tested. The result showed that stapes displacement stimulated\nby the transducer excitation at 10.5V RMS was equivalent to that from acoustic stimulation at 100 dB SPL, which is an adequate\nstimulation to the ossicular chain. The corresponding power consumption is 0.31mW per volt of excitation at 1 kHz, which is low\nenough for the transducer to be used in a middle ear implant. Besides, this transducer demonstrates high performance at high\nfrequencies.
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