What is the name of the cylindrical tube that protects the transducer's internal components and also insulates the patient from electrical shock?

• A. Case
• B. Electrical shield
• C. Acoustic insulator
• D. PZT

Answer: (A)

The outer case of the transducer is the cylindrical tube that both protects the internal components and insulates the patient from electrical shock. Inside, delicate piezoelectric elements, wiring, and backing materials need protection from handling, fluids, and electrical leakage, and the case provides that barrier as the external shell. While there is an electrical shield that helps prevent interference and leakage from the system, and the piezoelectric material itself that actually produces sound, neither is the protective cylindrical tube. The case is the correct term for the component described.