Measurements of Room Acoustic Parameters in Auditoriums by Simulating the Audience by Molton Cloth

Several measurements of room acoustic parameters have been published in the past, where concert halls with and without audiences have been measured. Hidaka et al. [1] and Lorenz/Breuer [2] additionally have used a special japanese cloth covering the seats for simulating the characteristic absorption of sound by a “real” audience. In this paper results of similar measurements using a cloth named Molton are published. This cloth is often used in theatre and stage design, it is very easy to get and reasonably priced. Room acoustic measurements were made in two auditoriums, a music rehearsal room and a reverberation chamber. Results of the occupied, the unoccupied and the “audience simulated” state were compared.