P3 / Reprogramming / Diagram

3

  a Reflections from the rear wall with a long delay increase the risk of echoes. Right-angles are particularly treacherous because the sound is reflected back parallel to its original direction.

Disturbing reflections can be avoided by:

  b including absorbent surfaces,

  c positioning the rear part of the ceiling at an angle,

  d including structured wall surfaces.

- MOMMERTZ, Eckard (2009) Music, Acoustics and Sound Insulation, Birkhäuser, p. 17