Flutter Echo

With two parallel reflective surfaces in a room, such as opposing walls or the floor and ceiling, there is always the possibility of successive, repetitive reflections that are equally spaced in time. Known as “flutter echoes,” these reflections can produce a perceived pitch or timbre that colors the audio heard in the room and reduce intelligibility. Diffusors can break up flutter echoes by reflecting the sound waves in different directions so that the repetitive reflections are eliminated. For more information, please refer to this article.