Document pBEK4R4jXm51oVm1R9veRjYKw

IEPORT OF SOUND ABSORPTION TEST A 53-2*2 ON BESTOALL LIGHT ACOUSTICAL PLASTER FOR BESTT'ALL GYPSUM COMPANY . February 18, 1958 submitted by Riverbank Acoustical Laboratories Ge ne va, Illinois ARMOUR RESEARCH FOUNDATION OP ILLINOIS INSTITUTE OF TECHNOLOGY SGP 0019706 I REPORT OF SOUND ABSORPTION TEST A 58-1*2 ON BESTRAIL LIGHT ACOUSTICAL PLASTER FOR BESTWALL GYPSUM COMPANY February 18, 1958 INTRODUCTION The method used in making these measurements meets the requirements of the American Society for Testing Materials* Proposed Method of Test For Sound Absorption of Acoustical Materials in Reverberation Rooms. A description of the measurements is given separately. DESCRIPTION OF MATERIAL MATERIAL THICKNESS Bestwall Light Acoustical Plaster 1/2* Nominal thickness Best-wall Light Acoustical Plaster Machine applied 1/2" sanded Gypsum basecoat 3/8" Gypsum lath 3-3/U" air space RESULTS OF TEST SURFACE Unpainted, textured COEFFICIENTS AREA TESTED MOUNTING 125 250 5cjQ looo 2000 Loop 72 sq.ft. U .25 .27 .52 .69 .78 .80 Ijbspectfully submitted. Ralph Huntley, Supervisor RIVERBANK ACOUSTICAL LABORATORIES ARMOUR RESEARCH FOUNDATION Geneva, Illinois O'VwJwti Donald A. Zedonis Research Assistant ARMOUR RESEARCH FOUNDATION OF ILLINOIS INSTITUTE OF TECHNOLOGY SGP 0019707 REPORT OF SOUND ABSORPTION TEST A 58-1^2 ON BESTWALL LIGHT ACOUSTICAL PLASTER FOR BESTVTALL GYPSUM COMPANY February 18, 1958 INTRODUCTION The method used in making these measurements meets the requirements of the American Society for Testing Materials * Proposed Method of Test For Sound Absorption of Acoustical Materials in Reverberation Rooms. A description of the measurements is given separately. DESCRIPTION OF MATERIAL MATERIAL THICKNESS Bestwall Light Acoustical Plaster l/2* Nominal thickness Bestwall Light Acoustical Plaster Machine applied 1/21* sanded Gypsum basecoat 3/8" Gypsvun lath 3-3/U" air space RESULTS OF TEST SURFACE Unpainted, textured COEFFICIENTS AREA TESTED MOUNTING 12$ 250 500 1000 2000 hooo NRC 72 sq.ft. h .25 1 .27 .52 .69 .78 | .88 .55 Ij^spectfully submitted. Ralph Huntley, Supervisor EIVERBANK ACOUSTICAL LABORATORIES ARMOUR RESEARCH FOUNDATION Geneva, Illinois Donald A. Zedonis Research Assistant ARMOUR RESEARCH FOUNDATION OF ILLINOIS INSTITUTE OF TECHNOLOGY SGP 0019708 REPORT OF SOUND ABSORPTION TEST A 58-U2 ON BESTWAIL LIGHT ACOUSTICAL PLASTER FOR BESTWALL GYPSUM COMPANY February 18, 1958 INTBDDUCTION The method used in making these measurements meets the requirements of the American Society for Testing Materials* Proposed Method of Test For Sound Absorption of Acoustical Materials in Reverberation Rooms. A description of the measurements is given separately. DESCRIPTION OF MATERIAL MATERIAL THICKNESS Bestwall Light Acoustical Plaster l/2ff Nominal thickness Bestwall Light Acoustical Plaster Machine applied l/2" sanded Gypsum basecoat - 3/8" Gypsum lath 3-3/Uw air space RESULTS OF TEST SURFACE Unpainted, textured AREA TESTED 72 sq.ft. COEFFICIENTS MOUNTING 125 250 500 1000 2000 hOOO h .25 .27 .52 .69 .78 .88 Ij^spectfully submitted. .55 [ >! S) & Ralph Huntley, Supervisor HIVEHBANK ACOUSTICAL LABORATORIES ARMOUR RESEARCH FOUNDATION Geneva, Illinois Donald A. Zedonis Research Assistant ARMOUR RESEARCH FOUNDATION OF ILLINOIS INSTITUTE OF TECHNOLOGY SGP 0019709 REPORT OF SOUND ABSORPTION TEST A 58-1*2 ON BESTI7ALL LIGHT ACOUSTICAL PLASTER FOR BESTWALL GYPSUM COMPANY February 18, 1958 INTRODUCTION The method used in making these measurements meets the requirements of the American Society for Testing Materials* Proposed Method of Test For Sound Absorption of Acoustical Materials in Reverberation Rooms. A description of the measurements is given separately. DESCRIPTION OF MATERIAL MATERIAL THICKNESS Bestwall Light Acoustical Plaster 1/2* Nominal thickness Bestwall Light Acoustical Plaster Machine applied l/2" sanded Gypsum basecoat .. 3/8" Gypsum lath 3-3An air space RESULTS OF TEST SURFACE Unpainted, textured COEFFICIENTS AREA TESTED MOUNTING 125 250 500 1000 2000 1*000 NRC 72 sq.ft. 1* .25 .27 .52 .69 .78 .88 Ijbspectfully submitted. Ralph Huntley, Supervisor RIVERBANK ACOUSTICAL LABORATORIES ARMOUR RESEARCH FOUNDATION Geneva, Illinois Donald A. Zedonis Research Assistant ARMOUR RESEARCH FOUNDATION OF ILLINOIS INSTITUTE OF TECHNOLOGY SGP 0019710 REPORT OF SOUND ABSORPTION TEST A 584*2 ON BESTWALL LIGHT ACOUSTICAL PLASTER FOR BESTWALL GYPSUM COMPANY February 18, 1958 INTRODUCTION The method used in making these measurements meets the requirements of the American Society for Testing Materials* Proposed Method of Test For Sound Absorption of Acoustical Materials in Reverberation Rooms. A description of the measurements is given separately. DESCRIPTION OF MATERIAL MATERIAL THICKNESS Bestwall Light Acoustical Plaster 1/2* Nominal thickness Bestwall Light Acoustical Plaster Machine applied l/2B sanded Gypsum basecoat 3/8w Gypsum lath 3-3/U" air space RESULTS OF TEST SURFACE Unpainted, textured COEFFICIENTS AREA TESTED MOUNTING 125 250 500 1000 2000 1*000 NRC 72 sq.ft. I* .25 .27 .52 .69 .78 .88 i^spectfully submitted. 55 (>% c# O'V'-aAj) ^ Ralph Huntley, Supervisor KEVERBANX ACOUSTICAL LABORATORIES ARMOUR RESEARCH FOUNDATION Geneva, Illinois Donald A. Zedonis Research Assistant ARMOUR RESEARCH FOUNDATION OF ILLINOIS INSTITUTE OF TECHNOLOGY SGP 0019711 REPORT OF SOUND ABSORPTION TEST A 58-1*2 ON BESTWALL LIGHT ACOUSTICAL PLASTER FOR BESTWALL GYPSUM COMPANY February 18, 1958 INTRODUCTION The method used in making these measurements meets the requirements of the American Society for Testing Materials* Proposed Method of Test For Sound Absorption of Acoustical Materials in Reverberation Rooms. A description of the measurements is given separately. DESCRIPTION OF MATERIAL MATERIAL THICKNESS Bestwall Light Acoustical Plaster l/2M Nominal thickness Bestwall Light Acoustical Plaster Machine applied 1/2w sanded Gypsum basecoat 3/8" Gypsum lath 3-3/U" air space RESULTS OF TEST SURFACE Unpainted, textured COEFFICIENTS AREA TESTED MOUNTING 125 250 500 1000 2000 1*000 NRC 72 sq.ft. u .25 .27 .52 .69 .78 .88 .55 C* l^spectfully submitted. Ralph Huntley, Supervisor RIVERBANK ACOUSTICAL LABORATORIES ARMOUR RESEARCH FOUNDATION Geneva, Illinois Donald A. Zedonis Research Assistant ARMOUR RESEARCH FOUNDATION OF ILLINOIS INSTITUTE OF TECHNOLOGY SGP 0019712