Work of PZT ceramics sounder for sound source artificial larynx
Work of PZT ceramics sounder for sound source artificial larynx
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DOI：
10.1117/12.715742
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发表时间：
2007-04
期刊：
影响因子：
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通讯作者：
Y. Sugio;R. Kanetake;A. Tanaka;K. Ooe
中科院分区：
文献类型：
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作者：
Y. Sugio;R. Kanetake;A. Tanaka;K. Ooe
我们的目标是开发易于使用、高音质的人工喉。我们重点使用PZT陶瓷发声器作为声源，因为它体积小，功耗低，对人体无害。但传统的PZT陶瓷发声器存在无法在低频范围内产生足够声音的问题，因此不能用于人工喉。然后，我们的目标是开发能够在低频范围内产生足够音量的PZT陶瓷发声器。如果我们能够降低发声器的共振频率，它就可以轻松地发出低音调的声音。因此我创造了低共振频率的新振膜。另外，我们可以通过改变驱动方法来获得高振幅。这次，我们将报道这款新型PZT陶瓷发声器与传统发声器的特性比较。此外，对于这一新产品，我们分析了 PZT 陶瓷的最佳排列和振膜的形状，以获得低谐振频率和大振幅。实际上我们分析的是结构的优化。分析是通过 ANSYS 和激光多普勒振动计的计算机模拟完成的。未来，我们将通过同时开发的输入波形为产生的声音添加音调，并通过将金属固定到生物分子的方法将发声器植入体内。这样就完成了高音质、方便的人工喉。
We aim to develop the easy-to-use artificial larynx with high tone quality. We focus on using a PZT ceramics sounder as its sound source, because it is small size, low power consumption, and harmless to humans. But conventional PZT ceramics sounder have the problem that it cannot generate an enough sound in the low frequency range, thus they cannot be used for artificial larynx. Then, we aim to develop the PZT ceramics sounder which can generate enough volume in the low frequency range. If we can lower the resonance frequency of the sounder, it can generate low pitch sound easily. Therefore I created the new diaphragm with low resonance frequency. In addition, we could obtain the high amplitude by changing method of driving. This time, we report on the characteristic comparison of this new PZT ceramics sounder and conventional one. Furthermore, for this new one, we analyzed the best alignment of PZT ceramics and the shape of the diaphragm to obtain low resonance frequency and big amplitude. In fact we analyzed the optimization of the structure. The analysis is done by computer simulation of ANSYS and Laser Doppler Vibrometer. In the future, we will add intonation to the generated sound by input wave form which is developed concurrently, and implant the sounder inside of the body by the method of fixing metal to biomolecule which is done too. And so high tone quality and convenient artificial larynx will be completed.