scholarly journals Five axis programmable positioning system for underwater acoustic measurements at Penn State

1994 ◽  
Vol 96 (5) ◽  
pp. 3289-3289 ◽  
Author(s):  
Kyle M. Becker
Keyword(s):  
Positioning System ◽  
Acoustic Measurements ◽  
Underwater Acoustic ◽  
Penn State ◽  
Five Axis

scholarly journals Underwater Acoustic Measurements on Polyvinylidene Fluoride Transducers

1978 ◽  
Vol 5 (3) ◽  
pp. 149-157 ◽  
Author(s):  
B. Woodward ◽  
R. C. Chandra
Keyword(s):  
Polyvinylidene Fluoride ◽  
Characteristic Impedance ◽  
Thin Sheet ◽  
Piezoelectric Transducers ◽  
Thin Sheets ◽  
Acoustic Measurements ◽  
Underwater Acoustic ◽  
Source Level ◽  
Operation Parameters

Methods of making piezoelectric transducers from very thin sheets of polyvinylidene fluoride (PVDF) are discussed, together with techniques for calibrating these devices, particularly for underwater operation. Parameters measured include receiving response, source level, beamwidth, characteristic impedance and variation of impedance with frequency. Consideration is also given to the dependence of receiving response on the poling fields and temperatures used in making PVDF transducers. Because of their broadband response thin sheet PVDF transducers have been shown to be ideal for monitoring the true form of acoustic pulses underwater.

Effects of cable scattering on underwater acoustic measurements

1990 ◽  
Vol 88 (S1) ◽  
pp. S114-S114
Author(s):  
Paul T. Arveson ◽  
Stephen J. Johnson
Keyword(s):  
Acoustic Measurements ◽  
Underwater Acoustic
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