| Autor: |
White, P. J., Clement, G. T. |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings; 2006, Vol. 829 Issue 1, p599-603, 5p, 6 Graphs |
| Abstrakt: |
The behavior of a 1–3 piezocomposite transducer at high driving amplitudes and off-resonance frequencies was investigated numerically and experimentally. By heuristically generating a numerical model of a simple resonator with a hard restoring force, a likely mechanism was identified for harmonic distortions in high power ultrasound transduction. Experimental observations of enhanced upper harmonic content in transducer response to a sinusoidal driving function were analyzed. This analysis revealed that a substantial proportion of the total pressure amplitude (at least 51%) was distributed into harmonics of the driving frequency, especially at frequencies that were below or above a characteristic resonance peak of the transducer. These results imply a need for more detailed and thorough evaluation of ultrasound transducers which are designed for high-intensity applications. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
