acoustic plaster[ə′küs·tik ′plas·tər]
Plaster having good acoustic absorbing properties; it contains metal which, upon contact with water, evolves gas to aerate the mass.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Plaster with a high degree of sound absorption properties.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved