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ASTM E1477-98A(2017)e1

ASTM E1477-98A(2017)e1

Standard Test Method for Luminous Reflectance Factor of Acoustical Materials by Use of Integrating-Sphere Reflectometers

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1.1 ,This test method covers the measurement of the luminous reflectance factor of acoustical materials for use in predicting the levels of room illumination.

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