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  • Transducers designed to convert electrical signals into mechanical energy in the form of sound (i.e., ultrasonic signals) and vice versa. These devices typically consist of an active element (e.g., ceramic or piezoelectric polymer) as well as a high-attenuation, high-density material that is used to control the vibration of the transducer by absorbing the energy radiating from the back face of the active element (i.e., a backing element); some transducers also include a wear plate that protects the transducer element from the environment. Features available for ultrasonic transducers include array configuration for connecting more than one transducer in series or in parallel. Ultrasonic transducers are typically housed in an enclosure (i.e., an ultrasonic probe) that is attached through an integral cable to ultrasound medical equipment (e.g., echocardiographs, ultrasonic scanners); ultrasonic transducers used with therapeutic devices (e.g., lithotripters) only transduce electric signals into ultrasound waves.
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