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Calibration

AcSoft performs calibration on sound & vibration instrumentation and transducers at its dedicated laboratory. Capabilities include calibration of:

  1. Sound level meters
  2. Vibration level meters
  3. Microphones/Microphone Sets/ Preamplifiers
  4. Accelerometers
  5. Acoustical Calibrators & Pistonphones
  6. Vibration Calibrators
  7. Impact Hammers

AcSoft has invested in three calibration systems for this purpose:

1) For calibration of microphones, microphone sets, and preamplifiers, the 90CA Calibration System from GRAS Sound & Vibration is used. The sensitivity is measured using a 42AP pistonphone, and the frequency response is measured by electrostatic actuator.

Microphones from most manufacturers can be calibrated, provided the relevant technical information is available.

Traceability is to Element Metech, a DANAK accredited laboratory in Denmark, conforming to the international standard ISO/IEC 17025 (equivalent to UKAS).

Array microphones can also be calibrated using the comparison method, and a GRAS 51AB phase calibrator.

2) For calibration of sound level meters, vibration level meters, acoustical calibrators, and pistonphones, a bespoke calibration system from Svantek Poland is used. This system is identical to that used by Svantek Sp z o o. as part of their ISO/IEC 17025 accreditation. Equipment from most manufacturers can be calibrated, provided the relevant technical information is available. part of their ISO17025 accreditation.

Traceability is to GUM, the Central Office of Measures, in Poland.

3) For calibration of accelerometers, a custom-built shaker system from DataPhysics and Listen Inc. is used, to cover a frequency range of 10Hz – 5kHz. The calibration technique uses the back-to-back method, with a Dytran 3123AK reference accelerometer.

Accelerometers from most manufacturers can be calibrated, provided the relevant technical information is available.

Traceability is to NPL, the National Physical Laboratory, England.

Discover frequently asked questions about calibration.

Our calibration lab is closing for Christmas on the 10th December!

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