LAUSR

More than 20 years after the first applications of micro-perforated sound absorbers in architectural acoustics there still is a growing demand of optically transpatent sound absorbers. Based on the theory of micro-perforated panel sound-absorbing constructions by D.-Y. Maa in 1975 various materials have been used as micro-perforated sound absorbers. Fully transparent sound absorbers as well as printed and translucent materials allow a combination of acoustic and light design. 3D-shapes used as lamps and other applications have become available. Measurements for different set-ups will be presented as well as applications in various projects will be discussed. Metal, wood, polycarbonate plates, and foils as well as other sheets have been micro-perforated. In this contribution, a short review of the applications of various different materials with transparent micro-perforated sound absorbers will be presented.More than 20 years after the first applications of micro-perforated sound absorbers in architectural acoustics there still is a growing demand of optically transpatent sound absorbers. Based on the theory of micro-perforated panel sound-absorbing constructions by D.-Y. Maa in 1975 various materials have been used as micro-perforated sound absorbers. Fully transparent sound absorbers as well as printed and translucent materials allow a combination of acoustic and light design. 3D-shapes used as lamps and other applications have become available. Measurements for different set-ups will be presented as well as applications in various projects will be discussed. Metal, wood, polycarbonate plates, and foils as well as other sheets have been micro-perforated. In this contribution, a short review of the applications of various different materials with transparent micro-perforated sound absorbers will be presented.