We just had a new sound system installed, but there are dead spots in the room, and places where words are not understood. What is happening?
Unfortunately, many firms that install sound systems do not fully understand how the system can interact with the room, or even how multiple loudspeakers can interact with one another. Sound from the loudspeakers could be reflecting from the walls and reaching your ears with a long delay after the initial sound has reached you directly from the loudspeaker. If you have multiple loudspeakers that are not close together, you could be hearing the sound from the different loudspeakers with a time delay. Sound travels faster as an electronic signal in a wire than as in a wire than it does through the air. Thus, if there are extra speakers near the rear of the room, the sound from these must be delayed electronically so you hear it at the same time you hear sound from the speakers near the front of the room. Another problem can occur because of interaction between the sound coming from two speakers very close together as in a cluster. At certain locations, sounds at certain frequencies from
