TADEUSZ KAMISIŃSKI, JERZY WICIAK
Department
of Mechanics and Vibroacoustics, University of Science and Technology
AGH al. Mickiewicza 30, 30-095 Kraków, Poland. kamisins@agh.edu.pl
In theaters where audience halls are
built on horseshoe-shaped plan the ceiling of the area under balcony at the
back of the hall is relatively low. Most people seated there experience poor
reception. Efforts have been made to formulate general guidelines addressing
that problem. Acoustical measurements of several halls have been performed
together with computer simulations of sound field. In the computer model,
acoustical data of finishing materials and acoustical structures obtained from
laboratory tests have been used. In particular, QRD sound diffusing structures
have been examined. Those structures were designed specifically for the halls.
In all cases the simulations showed improvement of acoustical parameters.