NWAA Labs 25132 Rye Canyon Loop, Santa Clarita, CA 91355, Phone: (253) 973-1018

Email address…Audio_Ron@msn.com

RANDOM- INCIDENCE SCATTERING COEFFICIENT TEST REPORT No. NWSC20091211-1

Client: RealAcoustix, LLC 903 North Marshall Way, Suite A Layton, UT 84041 Test Date: 11 December 2009 Test Specimen: RealAcoustix Geometric Uniform Diffuser (GūD) Panel 1inch INTRODUCTION The methods and procedures used in this test conform to the provisions and requirements of ISO Procedure 17497-1, Acoustics-Sound-scattering Properties of Surfaces, Part 1, “Measurement of Random-incidence Scattering Coefficient in a Reverberation Room”. Copies of the test standard are available at www.iso.org. The test chamber is a cuboid, 871.7cm long by 541cm wide by 609.6cm high, and volume is 275 cubic meters. There are six fixed surfaces and two movable/fixed surfaces oriented as diffusers in the reverberation room. There are two sources one in each corner consisting of two Dodecahedron speakers and two sub-bass cabinets for extended low frequency capabilities. We utilize 6 Earthworks M-30 Omni directional microphones to gather the impulse responses. This test report relates only to the item(s) tested. Any advertisement that utilizes this test report or test data must not imply product certification or endorsement by NWAA Labs. DESCRIPTION OF TEST SPECIMEN The test specimen consisted of 11 full sized panels of Glass Fiber Reinforced Gypsum (GFRG) that are 24 inches (60.96 cm) long by 24 inches (60.96 cm) wide and 1 inch (2.54 cm) thick and 16 partial panels that are of various sizes creating a circular sample with a diameter of 127.5 inches (3.24m). The surface of the GFRG was grooved in a proprietary pattern, Asymmetrical Cellular Acoustic Diffuser (ACAD), that made grooves that were 0.973 inches (24.71 mm) wide with various lengths across the surface. The pattern is shown in the included photo. Test results are presented on the following pages. Submitted by, NWAA Labs Inc ___________________________ Ron Sauro NWAA Labs Inc

Sample Name:

Time Temperature (in C°) Humidity

Start 4:47 21.57Running 21.59 Running 57.4%

Stop 5:12 21.60 57.2%

Time Temperature (in C°) Humidity

Start 3:35 21.50Running 21.51 Running 57.6%

Stop 4:01 21.52 57.2%

Time Temperature (in C°) Humidity

Start 4:20 21.54 57.9%Running 21.56 Running 57.7%

Stop 4:46 21.57

Time Temperature (in C°) Humidity

Start 3:08 21.41 58.7%Running 21.46 Running 58.3%

Stop 3:34 21.50

T-2

T-3

T-4

GuD Panel 1 inch

Temp and Humidty Worksheet

T-1

FrequencyAbsorptionCoefficient

ScatteringCoefficient

100Hz 0.05 0.00125Hz 0.00 0.00160Hz 0.06 0.01200Hz 0.03 0.00250Hz 0.00 0.01315Hz 0.04 0.05400Hz 0.00 0.00 NRC 0.00500Hz 0.00 0.01630Hz 0.00 0.08 SAA 0.01800Hz 0.00 0.04

1000Hz 0.00 0.091250Hz 0.00 0.071600Hz 0.00 0.092000Hz 0.00 0.292500Hz 0.00 0.423150Hz 0.00 0.554000Hz 0.00 0.655000Hz 0.00 0.746300Hz 0.00 0.868000Hz 0.00 0.87

10000Hz 0.00 1.05

NWAA Labs90 Tower Blvd

Elma, WA 98451(253)-973-1018

GuD Panel 1 inch

NWAA Labs90 Tower Blvd

Elma, WA 98451(253)-973-1018

Sample: GuD Panel 1 inch

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0.90

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315

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630

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Sound Absorption Coeff Scattering Coefficient