Document LKJDzv8k8wQp3GKv8QYJkekbz

A23 UNITED STATES GYPSUM COMPANY Sabinite Acoustical Plaster 300 West Adams Street CHICAGO, ILL. For Sales Otliccs, sec page A182 PLAINTIFF'S EXHIBIT Product acoustical analysis of the room. It is applied in two Sabinite Acoustical Plaster. (Licensed under successive coats eacli \\ in. thick, with the regular plas Sabine Patent No. 1,458,631. June 12, 1923.) terer's tools. For Sound Insulation, see pages A24-25. For Reinforced Roof Tile: Monolithic Roof and Floor Con struction, see pages A182-187. For Pvrobar Partition and Furring Tile: Beam and Column Covering, see paces A430-431. For Structolite Tile: Structo- litc Cement, see page A432. For Fireproof Wallboartl, see page BKiil. For Fireproof Sheathing, see page B1624. For Dry Fill Insulation, see page B1068. For Fireproof Lath, see page B1731. . For Gypsum Plasters and Fin ishes. see pages 111703-1765. For Colored Finish Plaster, sec page BI770. For Exterior Stucco, see page B1780. F'or Plastic Paint, sec page B2135. Lincoln Hall, Levy Mayer Building, Northwestern Uni versity School of Law, Chicago, 111. Purpose Sabinite Acoustical Plas ter is designed to correct the acoustics of auditoriums, churches, lodge hails, gym nasia, courtrooms, ballrooms, theaters, etc. It is also indi cated as a quieting agent in hospitals, office buildings, hotels, and similar struc tures. Why Sabinite Absorbs Sound Sabinite Acoustical Plas ter absorbs sound because of myriads of minute tortuous passages which proceed from the surface to the interior of the Vb'in. coat. Sound is re peatedly reflected in these passages, losing its energy to Advantages Sound absorbing mate JAmfs Gamble Rogers. NVw York. N\ Y. Chilhs & Clitcnco, 111.. Aisocuiti: Arctirtucts Wtills ami cctlink ot S.iinmtc Smith. heat and friction. The pas sages are inherent in the ma terial. No skill or art un rials previous to the invention of Sabinite were in gen known to the commonest plasterer is needed to obtain eral fabrics or similar soft fibrous substances--inherently them. combustible, catch-alls for dirt, vermin, and pathogenic bacteria. Some have conspicuous patterns which do not Absorption always fit into the plans for decoration. Sabinite is a hard Tests of Sabinite Plaster at Riverbank Laboratories plastic material which combines ample sound absorption yield a sound absorption coefficient at C4 (512 vibra with a permanent finish plaster that will not burn, rot or tions) of 3DSo : -at C6 (2048 vibrations, the pitch of mould. It is completely sanitary, cleanable and does not office noises) 39'T of the sound is absorbed. provide nesting material nor hiding places for vermin. Sabinite walls do not cause comment. They look Acoustical Analyses like other walls and may be painted or integrally tinted The company maintains a competent corps of to unobtrusively tit into any scheme of decoration, or acoustical engineers :or the convenience of architects. may be stenciled to form a major note in the beautifica Then- will analyze any auditorium from the plans before tion of any structure. They are applied by the plaster construction, predict the acoustical results and deter ing contractor under direct supervision of a service man mine proper areas of Sabinite where necessarv for the furnished without cost by the manufacturer. The correction of the reverberation time under full per absorption of Sabinite is guaranteed bv the manufac formance guarantees. This service is without ciiarge turer and is secured at usually lower costs per unit of or obligation. absorption. Users of Sabinite Description Sabinite Acoustical Plaster has been used on over Sabinite Acoustical Plaster is designed to combine 200 prominent structures without a single failure to meet definite absorption of sound with all of the properties all demands made on it. Among these buildings are struc of a finishing plaster. It is the invention of Dr. Paul tures designed by < italiain. Anderson, i'robst & W hite; - !-. Sabine, director of the most complete acoustical lames (iambic Royers; Bertram Grosvenor Goodhue laboratory in the world--the Riverbank Laboratories at Associates: Schmidt, Garden & F.rikson ; U. S. Treasury Geneva, Illinois. Department, and many others of similar prominence. Use Sabinite Acoustical Plaster is applied to ceilings or sidewalls in lieu of the usual plaster finish. The area to be covered should be determined after a careful Specification Data Complete specification data is found in the book "^abuuic-- -Controlled Sound" obtainable from any rep resentative or office of the company. Svvlft CaTaL(m;UE iC O U fc