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The acoustical testing facility at NGC Testing Services is considered one of the best available and is accredited for a wide range of tests. The acoustical laboratory complex consists of eight full-scale, independent, isolated test rooms and a control room containing state-of-the art instrumentation. For floor-ceiling tests, an overhead crane and movable test frames enables standard assemblies such as concrete slabs and wood framed constructions to be maintained in stock.

Our acoustical testing facilities include the following:

(NOTE: NGC Testing Services also offers the acoustical facilities on a user/fee basis for acoustical engineers capable of conducting their own tests.)

Size of test opening: 9'x14'; Sound Transmission Class (STC).

For testing:

• Partitions
• Building walls
• Doors
• Windows
• Barriers

Size of test ceiling: 20'x14'; Ceiling Attenuation Class (CAC).

For testing:

• Ceiling tile
• Suspended ceiling systems

Volume: 9960 cu. ft.; Noise Reduction Coefficient (NRC).

For testing:

Various acoustical materials

• Finishes
• Ceiling tile
• Insulation
• Office screens
• Space absorbers
• Baffles

Insertion loss of mechanical insulation products and sound transmission of smaller scale test specimens.

For testing:

• Pipe lagging systems (size of test pipe: nominal 12" diameter x 14' in length)
• Smaller scale sound transmission test specimens (size of test opening: 35 1/2" x 35 1/2")
• Automotive barriers

Size of test sample: 12'x16'; Sound Transmission Class (STC), Impact Insulation Class (IIC) and Impact Reduction (ΔIIC).

Multiple test floors are pre-constructed and stored out of the chambers and moved into place by overhead crane. In addition to constructing to specific designs, several common floor-ceiling assemblies such as concrete slabs and wood framed constructions are maintained in stock for use in Client test programs.

For testing:

• Floor Systems
• Finish Flooring
• Floor Underlayments
• Ceilings

Additional facilities for developing custom test programs to evaluate acoustical performance of a wide range of products.

The following is a selection of tests and classifications that NGC Testing Services Acoustical Testing Laboratory performs:

ASTM E 90

Laboratory measurement of airborne-sound transmission loss of building partitions (ISO 140, Part 3)

ASTM E 413

Classification of Rating Sound Insulation (STC)

ASTM E 1332

Standard classification for determination of Outdoor-Indoor Transmission Class (OITC)

ASTM E 1408

Test method for laboratory measurement of the sound transmission loss of door panels and door systems

ASTM E 1414

Standard test method for airborne sound attenuation between rooms sharing a common ceiling plenum (ISO 140, Part9)

ASTM C 423

Sound absorption and sound absorption coefficients by the reverberation room method (ISO 354)

ASTM E 1222

Standard test for lab measurement of the insertion loss of pipe lagging systems

ASTM E 492

Test for laboratory measurement of impact sound transmission through floor-ceiling assemblies using the tapping machine

ASTM E 2179

Test for laboratory measurement of the effectiveness of floor coverings in reducing impact sound transmission through concrete floors

ASTM E 989

Classification for determination of Impact Transmission Class (IIC)

SAE J1400

Automotive barriers

ANSI S12.31

Precision methods for the determination of sound power levels of broad-band noise sources in reverberation rooms

ANSI S12.32

Precision methods for the determination of sound power levels of discrete-frequency and narrow-band noise sources in reverberation rooms.

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E-mail: email@ngctestingservices.com