What term describes portion of the sound wave reflected from the boundary between two media?

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Multiple Choice

What term describes portion of the sound wave reflected from the boundary between two media?

Explanation:
When an ultrasound wave meets a boundary between two media with different acoustic impedances, part of the wave is reflected back toward the transducer. This reflected portion is what we identify as a reflection. The rest of the wave typically transmits into the second medium and may bend—that bending is refraction. The term reverberation refers to multiple, repeated reflections within a structure, not the single reflected portion at a boundary, and scattering describes redirection of sound in many directions due to heterogeneities. So, the portion that returns to the transducer from the boundary is called a reflection.

When an ultrasound wave meets a boundary between two media with different acoustic impedances, part of the wave is reflected back toward the transducer. This reflected portion is what we identify as a reflection. The rest of the wave typically transmits into the second medium and may bend—that bending is refraction. The term reverberation refers to multiple, repeated reflections within a structure, not the single reflected portion at a boundary, and scattering describes redirection of sound in many directions due to heterogeneities. So, the portion that returns to the transducer from the boundary is called a reflection.

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