Reflection of sound waves – this phenomenon involves the reflection of sound (acoustic) waves from obstacles in a given room or open space. We can talk about wave reflection when it bounces off a barrier, such as a wall of a room, and then returns. Acoustic waves in small rooms can reflect multiple times, resulting in acoustic defects, and we then refer to the phenomenon as comb filtering or flutter echo.
Several types of sound wave reflection are distinguished:
source reflection – occurs when the acoustic wave reflects off a flat surface, e.g., a wall, and returns. It can be avoided by using sound absorbers such as acoustic screens or constructing the room’s walls at appropriate angles;
scattered reflection – occurs when the acoustic wave reflects off an obstacle and is then dispersed in many directions, thereby minimizing the occurrence of acoustic defects such as echo, flutter echo, or comb filtering.
Reflection of sound waves is a natural phenomenon that can be managed in collaboration with an experienced acoustician. In some cases, this phenomenon is desirable and generated intentionally.
