Behavior of Acoustic Materials
Theater architects and engineers need accurate data on the performance of acoustic materials, which are used to control the acoustics of theaters. Descriptions of prefabricated materials and acoustic plasters are given. The mechanism of the sound-absorption process in porous materials is briefly described. There are two commonly used absorption coefficients, the “random-incidence” coefficient, and the “normal-incidence” coefficient. The experimental methods used for measuring the two coefficients are described. The significance and limitations of these coefficients in theater design are pointed out, and it is concluded that, at the present time, the random-incidence coefficient is more useful in auditorium design. Recommendations for painting acoustic materials are made, and illustrations of the results of painting are included.
- Print ISSN
- 0097-5834
- Published
- 1948-08
- Content type
- Original Research
- DOI
- 10.5594/J11766