The sound waves intensity immediately before it strikes a boundary is called _______.

The sound waves intensity immediately before it strikes a boundary is called _______.

• A. Incident intensity
• B. Reflected intensity
• C. Transmitted intensity
• D. Intensity Reflection Coefficient

Answer: (A)

When a sound wave moves toward a boundary, the energy it carries as it approaches the boundary is described as the incident intensity. This measures the power per unit area of the incoming wave just before any interaction with the boundary occurs. After meeting the boundary, part of that energy is reflected back into the original medium and part is transmitted into the second medium, which are the reflected and transmitted intensities, respectively. The intensity reflection coefficient is a ratio of reflected to incident intensity, not the incoming energy itself. So the term that matches “immediately before it strikes a boundary” is incident intensity.

When a sound wave moves toward a boundary, the energy it carries as it approaches the boundary is described as the incident intensity. This measures the power per unit area of the incoming wave just before any interaction with the boundary occurs. After meeting the boundary, part of that energy is reflected back into the original medium and part is transmitted into the second medium, which are the reflected and transmitted intensities, respectively. The intensity reflection coefficient is a ratio of reflected to incident intensity, not the incoming energy itself. So the term that matches “immediately before it strikes a boundary” is incident intensity.