Acoustics of coupled spaces relative to assisted reverberation
Bruce E. Walker, Ludwig W. Sepmeyer · The Journal of the Acoustical Society of America · 1983
One method of providing variable reverberation in an auditorium is to couple it electroacoustically with an auxiliary reverberation room. Parameters available for control of the composite characteristics include microphone and loudspeaker locations in both spaces, the reverberation time in both spaces, and the gain of the coupling amplifiers. By solving the coupled differential equations representing a simplified model of the arrangement, it was found that a variety of decay “shapes” ranging from concave (rate decreasing with time) to convex could be realized. Reverberation time could be varied over a greater than two to one range, while maintaining a “desirable” straight characteristic. Results of computer simulations for steady-state and transient excitations will be displayed.