Electroacoustic evaluations of 1-3 piezocomposite SonoPanel (TM) materials

An advanced configuration 1-3 piezocomposite, designated by its manufacture r as SonoPanel(TM), has been investigated For potential underwater acoustic al applications. In-air electromechanical characteristics and in-water acou stical properties of the SonoPanel(TM) were experimentally examined. The in -air impedance measurement results showed the existence of parasitic modes in the composite panel in addition to the expected thickness mode. This mod al behavior is identified to be related to the piezocomposite structure. In -water acoustical properties of the new 1-3 piezocomposite panels were inve stigated as a function of temperature, hydrostatic pressure, and frequency. The effect of underwater explosive shock on the acoustic responses showed no detrimental effects in mechanical structure or acoustical performance of the piezocomposite panel, Linearity with electrical drive level and hydros tatic pressure stability of the 1-3 piezocomposites also were established. These results suggest that the SonoPanel(TM) piezocomposite material is pot entially useful for underwater acoustical applications, particularly in app lications in which large area coverage is desired.