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Accreditation

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:

NVLAP Code Designation Description

Material Properties

08/P61 AAMA 1801 Acoustical rating of windows, doors, and glazed wall systems

Sound Absorption

08/P03 ASTM C423 Sound absorption and sound absorption coefficients by the reverberation room method
08/P102 ISO 10534-2 Acoustics -- Determination of sound absorption coefficient and impedance in impedance -- Part 2: Transfer-function method
08/P35 ASTM E1050 Impedance and absorption of acoustical materials using a tube, two microphones, and a digital frequency analysis system
08/P44 ISO 354 Acoustics/Measurement of sound absorption in a reverberation room
08/P72 AS ISO 354 Acoustics/Measurement of sound absorption in a reverberation room

Sound Transmission - Airborne

Airborne Sound Transmission -- Field
08/P100 ASTM E2964 Standard Test Method for Measurement of the Normalized Insertion Loss of Doors
08/P31 ASTM E336 Measurement of airborne sound insulation in buildings

Sound Transmission of Partitions
08/P06 ASTM E90 Laboratory measurement of airborne sound transmission loss of building partitions
08/P104 ISO 10140-3 Acoustics -- Laboratory measurement of sound insulation of building elements -- Part 3: Measurement of impact sound insulation
08/P96 ISO 10140-2 Acoustics - Laboratory measurement of sound insulation of building elements. Measurement of airborne sound insulation

Sound Transmissions in Spaces
08/P08 ASTM E596 Laboratory measurement of noise reduction of sound-isolating enclosures
08/P54 SAE J1400 Laboratory measurement of the airborne sound barrier performance of automotive materials and assemblies
08/P99 ANSI S3.1 Maximum permissible ambient noise levels for audiometric test rooms

Sound Transmission - Structure Borne

Structure Borne Sound Transmission -- Field
08/P32 ASTM E1007 Field measurement of tapping machine impact sound transmission through floor-ceiling assemblies and associated support structures

Structure Borne Sound Transmission -- Laboratory
08/P07 ASTM E492 Laboratory measurement of impact sound transmission through floor-ceiling assemblies using the tapping machine
08/P59 ASTM E2179 Laboratory measurement of the effectiveness of floor coverings in reducing impact sound transmission through concrete floors

Sound Power

Sound Power -- General
08/P46 ISO 3741 Determination of sound power levels of noise sources precision methods for broad-band sources in reverberation rooms
08/P60 ANSI S12.51 Determination of sound power levels of noise sources using sound pressure - precision method for reverberation rooms

Sound Power -- Machine Specific
08/P103 ISO 5129 Acoustics -- Measurement of sound pressure levels in the interior of aircraft during flight
08/P39 ANSI S12.5 Requirements for the performance and calibration of reference sound sources
08/P51 ISO 6926 Determination of sound power levels of noise sources requirements for the performance and calibration of reference sound sources

Standard Practices in Acoustical Testing

08/P70 ASTM E795 Standard practice for mounting test specimens during sound absorption tests


In addition to NVLAP accreditation, RAL meets ISO 17025:2005 standards and is certified by the City of Los Angeles, Department of Building and Safety and Underwriters Laboratories as an approved Testing Agency for Acoustical Testing.