What is a mirror-like image of sound energy that reflects most energy back in a single direction?

The correct choice describes specular reflection, which is characterized by a mirror-like surface that reflects sound waves in a single, coherent direction. This type of reflection occurs when sound waves strike a smooth surface, such as glass or a polished wall, allowing most of the sound energy to bounce back rather than dispersing in multiple directions.

In contrast, diffused reflection occurs when sound waves hit a rough surface, scattering the energy in various directions, which leads to a less coherent and less focused sound. Echo reflection refers to the phenomenon of sound reflecting off surfaces and returning to the listener, which can create a delay; however, it is not inherently about the directionality of the reflection. Ambient reflection describes the overall sound energy in a space and involves multiple reflections from various surfaces, leading to a blended sound environment, rather than a focused reflection.

Thus, specular reflection is the only type that specifically aligns with the definition of reflecting sound energy back in a single direction like that of a mirror, making it the correct answer.