THE ARCHITECTURE OF THE FAN-SHAPE AUDITORIUM. FORMATION OF LATERAL REFLECTIONS

The fan-shaped auditorium has several advantages for the comfort of the audience. But these shape halls do not have enough lateral reflections, and therefore are not considered to be of high quality for symphonic music. The article presents the results of theoretical studies of the fan-shaped auditorium to increase the Lateral Fraction (LF) and improve uniformity sound field due the geometry of the side walls, and specially designed Schroeder diffusers. The article also describes a geometric method for determining the installation locations of emitters that form active side reflections. As a result of the research, it was determined that active lateral reflections formed by VXL (Yamaha) columns combine specially designed Schroeder diffusers make it possible to provide an average value of the lateral fraction LF of more than 30% over the auditorium sound field in the frequency band from 100 Hz to 1250 Hz