- ACO Pacific, Inc.
- Manufacturer and supplier of measurement microphones and mic systems, industrial and community sound level alarm and monitoring systems, calibrators, sound intensity probes, acoustical/emi isolators, and noise generators.
- Acoustics Engineering
- Developing systems for the prediction and measurement of acoustical parameters.
- Acoustisoft Incorporated
- Offering a highly accurate PC based acoustic measurement system designed to meet the needs of both hi fi enthusiasts and professionals.
- Brüel & Kjær Sound & Vibration
- Manufacturer of sound and vibration measurement instrumentation.
- Castle Group Ltd
- Specialists in sound level meters and vibration measurement equipment.
- Cirrus Research plc
- Specialises in the design, manufacture and distribution of noise measurement instruments.
- HEAD acoustics, Inc.
- Provides complete testing systems used in the areas of sound quality evaluation, noise and vibration measurements, binaural (aachen head) recording and playback, and telecommunications voice quality and acoustics testing.
- Lansmont Corporation
- Manufactures data loggers, temperature recorders, humidity recorders and vibration measurement tools.
- Larson Davis, Inc.
- Designs, manufactures, and distributes acoustic and vibration measurement systems and industrial hygiene instrumentation.
- Unholtz-Dickie Corporation
- Specializes in the design and manufacture of complete vibration test systems, including electrodynamic shaker systems, shock and vibration controllers, horizontal slip table assemblies, long stroke thrusters, power amplifiers, transducer calibration systems, accelerometers and instrumentation.
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