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Journal of Sensors
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2016
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Article
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Tab 3
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Research Article
Design and Fabrication of Air-Based 1-3 Piezoelectric Composite Transducer for Air-Coupled Ultrasonic Applications
Table 3
Frequency of series resonant and parallel resonant of transducers.
Number
1
147.2 kHz
166.1 kHz
2
155.3 kHz
181.2 kHz
3
146.1 kHz
167.9 kHz