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. 2009 Jun 24;9(6):4986–5000. doi: 10.3390/s90604986

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© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 13. — The experimental frequency response functions of the designed ultrasonic transducer with horn diameter 6mm and horn holder diameter 13.0 mm and fixed by four clamp screws. The impedance spectrum is plotted as a function of the frequency between 80 kHz and 150 kHz. (a) The measured impedance spectrum plotted between 80 kHz-110 kHz. (b) The measured impedance spectrum between 110 kHz-150 kHz.