ASTM E1477 Luminous Reflectance Factor of Acoustical Materials
In ASTM E1477, the luminous reflectance factor of acoustical materials is measured in this test method and used to forecast the levels of room illumination. The values stated in SI should be considered as standard.
Scope:
The ASTM E1477 test procedure is used to determine the luminous reflectance factor. Acoustical materials are frequently used to cover the whole ceiling of a space, making them an important part of the lighting system.
Procedure:
In ASTM E1477, standard color-measurement procedures are used to determine the (total) luminous reflectance factor of test specimens using a spectrophotometer, tristimulus (filter) colorimeter, or other reflectometer using a hemispherical optical measuring instrument, such as an integrating sphere. The CIE tristimulus value Y for the CIE 1964 (10°) standard observer and CIE standard illuminant D65 (daylight) or F2 (cool white fluorescent) is used to compute the luminance reflectance factor.
Specimen size:
For ASTM E1477, each test specimen may be needed to meet the ±0.1 unit of Y tentative tolerance.
Data:
Luminous Reflectance Factor is calculated as follows:
LRV= Y value
LRV =luminous reflectance value
Y = tristimulus value
Conclusion:
The luminous reflectance factor of the acoustical materials is measured by using this ASTM E1477 test method. Also, through this method room illumination is also forecasted.
Talk to Our Experts Today!
Submit your contact info and we’ll get back to you within 24 hours
Full Spectrum of ASTM Material Testing — Backed by 2,000+ Trusted Lab Partners
ASTM standards for chemical composition, physical properties, failure analysis, and other routine and non-routine testing for polymers and plastics
ASTM standards for determination of mechanical, physical, and thermal properties, and performance of monolithic and composite ceramics
ASTM standards guiding various destructive, non-destructive and analytical tests for quality control of different metals and alloys
ASTM standards for chemical analysis of solid, liquid and gaseous materials for specification compliance and quality control
ASTM standards for various chemical, physical, stability and exposure analysis of paints and coatings
Our Services
Metrology
A variety of microscopy and spectroscopy tools available for precise measurements from the nano to the meter scale.
Learn More
Materials Testing
ASTM and ISO standard and custom chemical, mechanical, thermal, corrosion tests, etc. for all materials metals, ceramic or polymers.
Learn More
Product Testing
Thousands of tests for product quality and reliability under heat, humidity, temperature shock, vibration, drop, electrostatic discharge.
Learn More
