Hemiffusor™ W1 – Wooden Two Dimensional QRD Diffusor.

A The Wooden Two Dimensional QRD Diffusor shall be the model Hemiffusor™ W1 as manufactured by RPG® Diffusor Systems, Inc., Upper Marlboro, MD 20774. Tel: 301-249-0044, Fax: 301-249-3912.

B The Wooden Two Dimensional QRD Diffusor shall be hand crafted from solid Pawlonia wood.

C The Wooden Two Dimensional QRD Diffusor shall work on the two dimensional quadratic residue reflection phase grating principle, using an array of square wells separated by both vertical and horizontal dividers. The depths of the phase wells shall be based on the quadratic number theory sequence based on prime 7. The diffusing panels best installed in an optimized orientation as recommended by a professional consultant or the manufacturer.

D Absorption Coefficients and Noise Reduction Coefficient for the product shall be measured according to the test methods as defined by ASTM C 423 and ASTM E 795. Random incidence Absorption Coefficients for the product in
an A-mounting shall be as follows:

F No data is available as to flame retardency.

G The Wooden Two Dimensional QRD Diffusor shall be supplied in a clear satin lacquer finish.

H The overall dimensions shall be 23-5/8"(H) x 23-5/8"(W) x 4"(D) and weigh no more than 6 pounds.

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Specifications