Acoustics, Ultrasound and Vibration

MWG 9- accoustics, ultrasound and vibration

The Metrology Working Group for Acoustics, Ultrasound and Vibration (AUV) in SIM, MWG 9, support SIM and its member NMIs/DIs in meeting the obligations under the CIPM MRA in the field of acoustics, ultrasound and vibration measurements. From industrial applications, environmental monitoring to health care, metrology in AUV is critical to safe and efficacious medical treatments, protect workers in multiple industries, and enable development of better and more reliable products, as well as providing key support in fundamental research ranging from aerospace to health sciences.

Members of MWG 9 provide their respective National measurement standards for the branches: sound in air, sound in water and vibration. The services related to sound in air include calibration of measurement microphones, sound calibrators, sound measuring instruments, ear simulators, reference sound sources and audiometers. Sound in water include calibration of hydrophones for medical ultrasonic and underwater acoustics, and ultrasound transducers. Vibration and shock services comprehend calibration of acceleration measuring instruments, calibrators, acceleration measuring chains / accelerometers including linear and angular motion quantities, dynamic force related to mechanical impedance and mobility measurements of modal testing, and vibration signal conditioners.

In addition to realizing the derived SI units relative to these calibrations, members of MWG 9 also conduct basic and collaborative research in calibration and measurement techniques as a foundation to the metrology, which supports a wide range of customer needs.

  • MWG 9 organizes regional key and supplementary comparisons as well as pilot studies in the field of AUV, and links these SIM activities to the Consultative Committee for Acoustics, Ultrasound and Vibration (CCAUV) of the CIPM and to its counterparts in other Regional Metrology Organizations (RMOs).
  • MWG 9 facilitates cooperation in preparing, publishing and maintaining calibration and measurement capability claims (CMCs) of member economies and of American laboratories new to international metrology.
  • MWG 9 facilitates technical cooperation among its members and guests through meetings, workshops and training opportunities at various NMIs/DIs.
  • MWG 9 seeks harmonization among its members through sustainable networking.
  • MWG 9 welcomes cooperation with other communities to promote and to share advanced technology.



Chair : election process


Vice Chair:

Gustavo Ripper


[email protected]



  • Contacts[to be developed]
  • Projects [to be developed]
  • Events & Meetings [to be developed]
  • Annual Reports & Documents [to be developed]
  • Strategy & Roadmaps [to be developed]


Key Comparison Database (KCDB), hosted by the BIPM

International Measurement Comparisons (Appendix B) in Acoustics, Ultrasound and Vibration

Calibration and Measurement Capabilities (CMCs; Appendix C) in Acoustics, Ultrasound and Vibration