Wooden panelling and acoustic plaster was used to give the hall excellent acoustic qualities.

Acoustic plaster is plaster which contains fibres or aggregate so that it absorbs sound.

Acoustic plaster is used in construction of rooms which require good acoustic qualities such as auditoria and libraries.

Proprietary types of acoustic plaster developed in the 1920s included Macoustic Plaster, Sabinite, Kalite, Wyodak, Old Newark and Sprayo-Flake produced by companies such as US Gypsum.

Set amid fields, forests, and farmhouses, the Gropius House mixes up the traditional materials of New England architecture (wood, brick, and fieldstone) with industrial materials such as glass block, acoustic plaster, and chrome banisters.