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WESTERN ELECTRO - ACOUSTIC LABORATORY, INC. TESTING • CALIBRATION • RESEARCH • CONSULTING lipy 1711 Sixteenth Street, Santa Monica, California 90404 (310) 450-1733 Fax: (310) 396-3424 REPORT 30 March 1999 SOUND ABSORPTION TEST NO. AB99-142 CLIENT: K-X INDUSTRIES,INC. TEST DATE: 29 March 1999 TEST SPECIMEN: Free Standing Wall Specimen INTRODUCTION The methods and procedures used for this test conform to the provisions and requirements of ASTM Procedure C423-90a,Standard Test Method for SawidAbsorption and SmmdAbsorption Coefficients by the Reverberation Room Method. Details of the procedure will be famished upon request. Western Electro-Acoustic Laboratory is accredited by the United States Department of Commerce,National Institute of Standards and Technology under the National Voluntary Accreditation Program(NVLAP)for this test procedure. This test report relates only to the item(s)tested. Any advertising which utiliws this test report or test data must not imply product certification or endorsement by WEAL,NVLAP,NIST or the U.S. Government. DESCRIPTION OF TEST SPECIMEN The test panel was a K-X Industries free standing wall section. The manufacturer's description of the specimen was as follows: The FASWALL insulating permanent concrete forms(ICE)were manufactured in a block making machine t using the K-X mineral processed wood fiber chips(K-X Aggregate)mixed with cement and fly ash. The wall bins(WE)had male-femaleinte€locking sections on the sides. The specimen was constructed in the laboratory on a reinforced pallet to allow installation and removal from the test chamber. The wall forms(WE)were stacked dry without staggering them and no mortar was used. The WF were filled with dense concrete that was mixed in a concrete mixer and poured into the cores with buckets. The concrete was allowed to cure for approximately 72 hours before testing. The overall dimensions of the sample were 48 inches(1.22 m)wide by 72.5 inches (1.84 in) high by 11.5 inches (.292 m)thick. The area used in the calculation included both sides, both ends, and the top of the specimen. All gaps and spaces in the pallet were Idled with concrete and 2"x 6"wood studs were used around the perimeter of the pallet to seal it to the floor of the chamber. The overall weight of the specimen was estimated to be 1885 lbs. (855 kg)based on 78,1bs1ft2(1249 kg/m2). TEST RESULTS Area Tested: 59.91 sq.ft. Mounting:Free Standing 1/3 Octave Band Center Frequency(Hz) 125 250 500 1000 2000 4000 NRC Sound Absorption(Sabin) I5.7 23.2 45.9 55.9 52.7 55.1 Sound Absorption Coefficient .26 .39 .77 .93 .88 . .92 .70 95%Confidence .08 .05 .07 .06 .04 .04 • Respectfully submitted, 411, Western Electro-Acoustic Laboratory, Inc. Gary E. ge `VYJ O� ACCREDITED BYTHE NATIONAL INSTIME OF ST DAROS AND TECHNOLOGY(NIST(. V I:J NATIONAL VOLUNTARY LABORATORY ACCREDITATION PROGRAM FOR SELECTED TEST METHODS FOR ACOUSTICS.