What term describes the redirection of sound in several directions when it encounters a rough surface, also known as nonspecular reflections?

What term describes the redirection of sound in several directions when it encounters a rough surface, also known as nonspecular reflections?

• A. Reflection angle
• B. Refraction
• C. Scattering
• D. Specular reflections

Answer: (C)

Scattering is the process where sound is redirected in many directions when it meets a rough surface. Unlike a smooth boundary that reflects sound as a single mirror-like ray—where the angle of incidence equals the angle of reflection—a rough interface disrupts that orderly reflection and distributes energy in multiple directions. Refraction would involve bending as sound enters a different medium, not a spread in directions at the boundary. The term scattering is the best description here because it specifically describes the diffuse, multi-directional return produced by surface irregularities and small tissue structures, which also contributes to the speckle texture seen in ultrasound images.

Scattering is the process where sound is redirected in many directions when it meets a rough surface. Unlike a smooth boundary that reflects sound as a single mirror-like ray—where the angle of incidence equals the angle of reflection—a rough interface disrupts that orderly reflection and distributes energy in multiple directions. Refraction would involve bending as sound enters a different medium, not a spread in directions at the boundary. The term scattering is the best description here because it specifically describes the diffuse, multi-directional return produced by surface irregularities and small tissue structures, which also contributes to the speckle texture seen in ultrasound images.