Sound reflection
For all noise problems related to sound insulation or sound attenuation, the reflection of a sound source from an obstacle, e.g. wall, window, ceiling, floor, machines, etc., must be considered. is an important factor. The reflection depends on the frequency and direction of the sound wave towards the obstacle as well as on the nature and surface structure of the reflecting obstacle.
The returning, reflected wave is superimposed on the incoming wave and, depending on the conditions, in extreme cases results in the sound wave being cancelled or amplified. Basically, it can be said that a strong reflection takes place with sound-hard walls and a high sound absorption can be achieved with sound-soft walls.
