Sound reflection occurs when sound waves bounce off surfaces, similar to how a ball bounces off a wall. When you shout in a large empty space, like a canyon or gymnasium, you might hear your voice echo back to you. This happens because the sound waves hit a surface and reflect back toward you, creating the effect of an echo. Different surfaces affect sound reflection in various ways. Hard surfaces, like concrete or glass, reflect sound more effectively than soft surfaces, such as carpets or curtains, which absorb sound. This is why concert halls are designed with specific materials to enhance sound quality and clarity.