- on Education & Information
- Published in issue 10/2009 on page 14
Sound projection, noise cancellation and wave field synthesis
Music, speech, noisy neighbours – sound is all around us. And yet the science of acoustics holds many surprises: sound can be focused into beams, noise can be cancelled out by more noise, and sound waves can be made to appear from nothing as if by magic. Here we explain how the tricks are done.