San Francisco : Architect and Engineer, Inc · leaf 449
ng, or the effects of differ-ent types of decoration. Where large amounts of acoustical plas-ter are to be used in a building, and the out-come in acoustics is very important, it isadvisable to require the plastering contrac-tor to prepare a small room for test, usingthe same type of plaster and… … Fig. 2—Arrangement of apparatus for determining theporousity of acoustical plaster. a suitable reverberation meter, which willdetermine whether the acoustical plasterwill meet the specifications of absorptivityrequired to give the optimal condition ofreverberation in the building. The plasterin the…
Architecture · Building
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