acoustical plaster[ə′küs·tə·kəl ′plas·tər]
A low-density sound-absorbing plaster applied as a finish coat to provide a uniform finished surface.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A special low-density sound-absorptive plaster, applied in the form of a finish-coat, to provide a continuous finished surface.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.