Sound Systems & Home Theaters

Location: North of Dallas, Texas, including
Frisco, Plano, Allen & McKinney

Sound Reflections and Computer Modeling

The shape of the room, along with the absorption and diffusion elements in the room, are what affect sound reflections. We recommend sound absorption and diffusion treatments based on fundamental parameters established for improving concert hall acoustics. Some companies use the dubious, and greatly over-simplified, "live end dead end" method or the "first reflection mirror" method to recommend acoustical treatments. Other companies use "sophisticated" computer programs to model the room and predict what various acoustical treatments will sound like. Unfortunately, there are no computer programs available that are completely accurate. The computer can calculate sound reflections at specific angles from a particular location on the stage (or the front of the room) to a designated seat, but if you move to a different location on the stage, or a different seat, everything changes. Even moving your head slightly at the same seat will change everything, not to mention that the computer programs don't even take into account the fact that you have two ears. The sound in a room is kind of like the weather outside, so computer models are never completely accurate because there are too many variables.

The rule of thumb for acoustical treatments is that they should be added in moderation, with enough flexibility to allow modifications after actual measurements have been made in the finished room.

The golden rule for room shape is to make it a shoebox, and avoid curved walls.

Acoustical Analysis

We conduct an acoustical analysis of your space, considering room shape, surface diffusivity, and sound proofing requirements to make recommendations tailored to your expectations. Because the room interacts with and changes sound in many ways, we calculate reverberation time and inter-aural cross correlation. We can then recommend sound absorption and diffusion treatments to enhance audience listening. Using architectural drawings, block diagrams and electrical schematics, we make sure the finished product complies with all applicable requirements.

Example Ceiling Absorbers at Murray Feiss:

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