Which term describes the conversion of an acoustic pressure into an electrical signal inside the transducer?

Which term describes the conversion of an acoustic pressure into an electrical signal inside the transducer?

• A. Curie effect
• B. Piezoelectric effect
• C. Doppler effect
• D. Snell effect

Answer: (B)

The piezoelectric effect explains how pressure from the acoustic wave is turned into an electrical signal. In the transducer, certain crystals deform when they experience mechanical stress from the sound wave, and that deformation generates an electric charge. The resulting voltage across the crystal is what the receiver senses as the electrical signal. This is the direct piezoelectric effect. The other terms don’t describe this conversion: the Doppler effect is about frequency shifts due to motion, Snell’s law concerns refraction at interfaces, and Curie-related concepts relate to material phase changes rather than the actual conversion of pressure to electricity.

The piezoelectric effect explains how pressure from the acoustic wave is turned into an electrical signal. In the transducer, certain crystals deform when they experience mechanical stress from the sound wave, and that deformation generates an electric charge. The resulting voltage across the crystal is what the receiver senses as the electrical signal. This is the direct piezoelectric effect. The other terms don’t describe this conversion: the Doppler effect is about frequency shifts due to motion, Snell’s law concerns refraction at interfaces, and Curie-related concepts relate to material phase changes rather than the actual conversion of pressure to electricity.