Loudspeaker Sound Improvement for less than $3.
The recommended layout for speakers in a room is to place the speakers, and the listening position, at least a meter from any adjacent wall. That space lessens the audibility of room refractions, for cleaner sound. But the layout of most rooms forces placement of the sofa against the back wall. Therefore the seated listener hears back wall reverberation and distortion.
A partial solution is to make a set of ear cups, which will lessen audibility of back – wall reflections. The efficacy of this solution can easily heard by cupping your hands behind your ears and removing and replacing your hands. Presto! Less distorted and louder clean sound from your speakers. I estimate the gain at least +3db, plus improved musical detail.
Ear cups can easily be made from a hemispherical plastic food container, about four inches in diameter. Such containers are widely available for sale. Cut the plastic bowl in half with a razor knife (careful), through the base. Drill holes on the top and bottom open edges. Then connect the halves, top and bottom, with half-inch elastic strips, wide enough to fit your head and behind your ears. Now listen for much improved sound.
The same gizmo may be used to upgrade your concert seat from far back in the hall, to audibility near the front of the stage.
Jeffrey Asher
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