One well-proven method that has been used over a long period of time for the acoustic design of a custom home theater system is to build a smaller version of the movie theater that is similar to the original room, the least geometrically, and To study the propagation of the waves in this model. This method has the advantage that, with few expenses, multiple variations can be judged: the choice of different acoustic treatments to the wall and important changes in the form of home theater.
As several propagation properties are common to all types of waves, it is not absolutely necessary to use sound waves for home theater model measurements. More profitable is the use of light as its substitute. Detection of the energy distribution in the home theater can be achieved by photocells or photography.
Although dedicated home theater physical models have proven to be a very useful tool for acoustical design, they are gradually replaced by a less expensive, faster and more efficient, ie by numerical simulation of sound propagation in loudspeakers. The introduction of the digital room acoustics computer is probably due to M. Schroeder and colleagues. Meanwhile, computer simulation has been applied not only to home theater systems, but also to factories, the auditorium and other workspaces.
Basically, there are two sound field simulation methods currently used for home theater designs; Namely ray tracing and image source method, and both are based on geometric acoustics. The most tedious and time-consuming part of the whole process is the collection and entry of the piece of data, such as the positions and orientations of home theater walls and acoustic properties. One can study the combined effect of more than one source and take into account all home theater speakers. This allows home theater designers to determine the optimal configuration of a speaker system in a home theater system.