What is the primary function of the piezoelectric crystal inside the transducer?

What is the primary function of the piezoelectric crystal inside the transducer?

• A. Generate and receive ultrasound waves
• B. Generate heat
• C. Store data
• D. Shield the device

Answer: (D)

The piezoelectric crystal is the active element that converts energy back and forth between electricity and sound. When a voltage is applied, the crystal rapidly changes shape, generating ultrasound waves that travel into the body. When echoes come back, the crystal flexes in response to the returning sound and produces a small electrical signal that the system uses to form the image. This dual capability—transmitting ultrasound and receiving echoes—is what makes the crystal the core component of the transducer. It isn’t mainly for heating, data storage, or shielding, which are not functions of the crystal itself.

The piezoelectric crystal is the active element that converts energy back and forth between electricity and sound. When a voltage is applied, the crystal rapidly changes shape, generating ultrasound waves that travel into the body. When echoes come back, the crystal flexes in response to the returning sound and produces a small electrical signal that the system uses to form the image. This dual capability—transmitting ultrasound and receiving echoes—is what makes the crystal the core component of the transducer. It isn’t mainly for heating, data storage, or shielding, which are not functions of the crystal itself.