Lower frequency sound results in a ______ half-value layer.

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

Lower frequency sound results in a ______ half-value layer.

Explanation:
Attenuation and the half-value layer depend on frequency: lower frequency sound is attenuated less per unit distance, so you need a greater thickness to reduce the intensity by half. Mathematically, I = I0 e^{-αx}, and the HVL is x = ln 2 / α. Since the attenuation coefficient α increases with frequency, lowering frequency lowers α, which makes the HVL larger. Therefore, a thicker half-value layer is required for lower frequency sound. That’s why the best choice is thick.

Attenuation and the half-value layer depend on frequency: lower frequency sound is attenuated less per unit distance, so you need a greater thickness to reduce the intensity by half. Mathematically, I = I0 e^{-αx}, and the HVL is x = ln 2 / α. Since the attenuation coefficient α increases with frequency, lowering frequency lowers α, which makes the HVL larger. Therefore, a thicker half-value layer is required for lower frequency sound. That’s why the best choice is thick.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy