A BASIC STUDY ON ACOUSTIC PROPERTIES OF DOUBLE-LEAF MEMBRANES

Low absorptivity is a problem associated with many membrane-structure buildings and can result in a long reverberation time which degrades t he acoustic environment. One possible solution to this problem may be the use of membranes to form the ceiling. The present study examines t he acoustic properties of double-leaf membranes, which have recently b ecome widely used in the construction of membrane-structure buildings. Parametric studies with theoretically calculated results show the eff ects of various parameters on absorptivity and transmissibility. Exper imental results confirm the theory. The possibility of using double-le af membranes to construct the absorption structures is then discussed. (C) 1998 Elsevier Science Ltd. All right reserved.