@cdc “Once you start, it’s hard to stop”
So comical those pics. So my sense of weird humour too! A room to cure the ones who can’t stop themselves.
Also very practical and somewhere to put the toy boy’s so they don’t hurt themselves?
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@andy2
Speaker sound waves are first reflected from the sides, ceiling and floor and compete for your attention with the initial sound waves directly from the speaker. Although the reflections arrive later and are measurably distinct, they arrive at our ears too soon for our psychoacoustic system to distinguish them from the initial signal and they become one in our head. What can be lost or overwhelmed by this wave interference are the subtler sound waves that help depict hall size, performer placement, soundstage width and depth, and the music’s overall tonal signature. I think of this as more the "psycho" part of psychoacoustics and is distinct from later reflections bouncing around the room that result in frequency peaks and nulls that accrue from room modes and the like. These also interfere with the initial speaker signal much as first reflections do, but they further screw up the sound when they contribute to a less than smooth room frequency curve and/or cause “ringing”. Treatment at first reflection points helps a heck of a lot, but whole room treatment is necessary to deal with later reflections.
Absorption simply captures these interfering wave reflections and does not let them go. Diffusion breaks the waves up and reflects them in different directions instead of directly back at you. To better understand diffusion’s role, imagine being in a room and shooting a shotgun directly at a flat wall (no diffusion) versus against a rock wall (diffusion). The return path of the former is predictable and most are flying directly back at you. The latter will have much of the shot going elsewhere and taking a more circuitous route, bouncing off the surfaces of the room and even bumping into other shot before they might return to you. Because they are fewer, have been delayed, and have a lower energy, their return will not bother you as much as if they came flying straight back at you. Similarly, diffusion provides a time delay along with a weaker signal, allowing your psychoacoustic system to ignore or at least differentiate the reflections from the initial signal. Scattering panels work similarly and often are combined with absorption.
While your room may be somewhat symmetrical, you probably want to avoid "first reflections" and instead have either "first absorption" or diffusion. Opinions are mixed as to which is better. It is probably easier to do absorption with standard home goods/furnishings such as rugs, blankets, curtains, overstuffed couches, etc. Some suggest that books and records have significant absorption properties, but I would argue they are primarily reflective and if there is absorption, it is over an extremely limited frequency range. Bookshelves, racks, and the like do not give a predictable diffusion pattern. You may be getting different reflections from various media or equipment but they will not have the significant and ordered differences in depth to achieve meaningful diffusion. Neither will a popcorn ceiling nor textured wallpaper. On the other hand, if you wanted to arrange your equipment or books to follow a QRD pattern, you might see some benefit.
Consider hanging draperies on your windows and covering the TV with a blanket. I anticipate you will notice a difference.
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@mylogic haha, my thoughts too. Glad not taken the wrong way.
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@cdc
Perfect and that is a straight jacket laying on the bed, correct?
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