Speaker Asylum

Digital "room correction" versus conventional room acoustics treatments

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Room acoustics problems are best solved with room acoustics treatments.

The problems are all caused by room reflections (assuming the speakers are decent and not placed in foolish locations)

However the amount of reflection absorbing room treatments for bass frequencies (aka bass traps) scares some people (think about filling 2% to 3% of the room's volume with a dozen large diameter tube traps or think of stacks of home insulation rolls from floor to ceiling in each room corner!)

Fortunately, bass is omnidirectional so there is no meaningful distinction between the direct sound from the speakers and reflections off room surfaces. Most bass energy is reflected off one or more room surfaces before it reaches your ears. That means using an EQ on the direct bass sound from the speakers can offset bass problems that are actually caused by later bass reflections.

Any bass peak you hear at one seat can be eliminated by reducing a narrow band of bass output from the speakers using a parametric equalizer. Nearby seats often benefit too. A more distant seat will usually need very different equalization and may sound worse. You can't equalize a whole room.

Other than the very important elimination of bass peaks as described above, and time delay to correct for speakers and subwoofers located different distances from the ears, "digital room correction" has sounded great in theory for many decades ... but so far somewhat disappointing in practice compared with conventional room acoustics treatments that work well.
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Richard BassNut Greene
"The Floyd R. Turbo of Bingham Farms Michigan"


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