At the beginning of the far zone the beam is how wide compared to the transducer?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Sharpen your skills for the Davies Publishing SPI Test with targeted flashcards and multiple-choice questions, complete with hints and clarifications. Prepare thoroughly for success!

Multiple Choice

At the beginning of the far zone the beam is how wide compared to the transducer?

Explanation:
Understanding how ultrasound beams diffract helps here. The transducer acts like a circular aperture, and as the waves move away, diffraction causes the beam to diverge. The boundary between the near and far field is roughly where the main beam starts to spread significantly. At that starting point, the diffraction pattern predicts the beam’s width to be about 0.6 times the transducer diameter—roughly half as wide as the transducer itself. So, at the beginning of the far zone the beam is about half as wide as the transducer. Beyond that point the beam continues to widen with distance.

Understanding how ultrasound beams diffract helps here. The transducer acts like a circular aperture, and as the waves move away, diffraction causes the beam to diverge. The boundary between the near and far field is roughly where the main beam starts to spread significantly. At that starting point, the diffraction pattern predicts the beam’s width to be about 0.6 times the transducer diameter—roughly half as wide as the transducer itself. So, at the beginning of the far zone the beam is about half as wide as the transducer. Beyond that point the beam continues to widen with distance.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy