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Architectural Acoustic Testing

Stork operates an advanced acoustic testing laboratory and employs experienced staff to provide accurate and reliable noise emission and sound emission data to our customers. Stork is also one of only a handful of laboratories approved by the National Voluntary Laboratory Accreditation Program (NVLAP) for field acoustic testing (STC & IIC ratings).

Stork acoustical chambers and acoustic testing experts are qualified to evaluate:

  • Sound Transmission Class/Rw. In Stork's test chamber built from standard construction materials for accurate results, Stork measures transmission of outdoor sound through windows, doors and wall constructions. This measure is used to rate the effectiveness of a material to attenuate sound.
  • Outdoor Indoor Transmission Class (OITC). Relating to ground and air trans-portation noise, Stork experts evaluate building facades.
  • Noise Reduction Coefficient (NRC). This test determines sound absorption properties of materials such as acoustical ceiling pro-ducts, draperies, carpets, etc.
  • Noise Emission: Sound Power/ Sound Pressure Evaluations. Noise emissions of devices such as computer equipment, fans, pumps, or air conditioners are measured.
  • Noise Emission of Plumbing Appliances and Equipment. This test is designed to ISO 3822 specifications for the purpose of determining the noise emitted by faucets, shower heads, valves, and other plumbing-related equipment. Stork scientists measure "Lap," or the dBA sound level produced by an appliance—a necessary rating for products marketed in Europe.

Field Acoustic Testing Services
Stork is one of only a handful of labs approved by the National Voluntary Laboratory Accreditation Program (NVLAP) for field acoustic testing. Stork's field testing capabilities include:

  • Field Sound Transmission Class (A-STC), Sound Reduction Index (ISO 140-3), and Field Impact Insulation Class (F-IIC)
    These tests evaluate compliance with the Uniform Building Code for sound and foot-fall transmission through party walls, floor/ceiling systems, doors, etc. associated with multi-family housing.
  • Occupational Safety and Health Association (OSHA) Noise Compliance
    Factories and other industrial sites are tested, including dosimeter studies and consulting, to determine compliance.
  • Environmental Noise Assessments
    Stork prepares environmental impact statements for submission to local, state and federal agencies.

Field and laboratory tests can be combined and adapted to fit the specifications of your project. As consultants, Stork  engineers and scientists can evaluate architectural drawings, construction sites, and industrial/business facilities.

Meeting standards
The Stork Materials Technology group is an international network of independent testing laboratories.
Our quality program meets the ISO/IEC Guide 17025 standards (equivalent to the relevant laboratory requirements of the ISO 9002 series of standards).

Acoustic Test Methods and Procedures
Laboratory Acoustic Tests Field Acoustic Tests
  • ASTM E90
  • ISO 140
  • ASTM E1425
  • ASTM E1408
  • ASTM C423
  • ISO 354
  • AAMA 1801
  • Floor test
  • Wall test
  • Hurricane Test
  • Impact test
  • Sound Transmission Class - STC
  • ASTM E336
  • ASTM E996
  • ASTM E1007
  • Reverb time (RT60)
  • OSHA compliance
  • Environmental site noise assessments
  • Outdoor Indoor Transmission Class - OITC
  • Sound Reduction Index - ISO 140-3
  • Want to learn more about acoustic testing or other services we offer? Send us your question for a quick response. 

    Acoustic testing services at Stork

    Acoustic testing services at Stork

    Locations for Architectural Acoustic services:

  • Stork Twin City Testing Corporation - St. Paul, MN

  • Stork Twin City Testing Corporation - Wausau, WI

  • Stork Twin City Testing Corporation - Des Moines, IA

  • Stork Twin City Testing Corporation - Maplewood, MN


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