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RAL is accredited by the National Institute of Standards and Technology (NIST) through the National Voluntary Laboratory Accreditation Program (NVLAP) for selected acoustical testing services conducted in accordance with established standards.

The scope of the NVLAP accreditation currently includes:
 
  1. ASTM C423 (ISO 354)

    2. Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method (Acoustics/Measurements of Sound Absorption in a Reverberation Room)

  2. ASTM E90 (ISO 140, Part 3)

    3. Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions (Laboratory Measurement of Airborne Sound Insulation of Building Elements)

  3. ASTM E492

    4. Laboratory Measurement of Impact Sound Transmission Through Floor-Ceiling Assemblies Using the Tapping Machine

  4. ASTM E2179

    5. Laboratory Measurement of the Effectiveness of Floor Coverings in Reducing Impact Sound Transmission Through Concrete Floors

  5. ASTM E1408

    6. Laboratory Measurement of the Sound Transmission Loss of Door Panels and Door Systems.

  6. ANSI S12.31 (ISO 3741/ISO 6926)

    7. Determination of Sound Power Levels of Broad-Band Noise Sources in Reverberation Rooms (Determination of Sound Power Levels of Noise Sources – Precision Methods for Broad-Band Sources in Reverberation Rooms)

 

In addition to NVLAP accreditation, RAL is also certified by the City of Los Angeles, Department of Building and Safety, and Underwriters Laboratories as an approved Testing Agency for Acoustical Testing.