MN School Calibration Announcement

Annual Calibration Process for Hearing Screening Equipment – Audiometers, Tympanometers, and Otoacoustic Emissions (OAE)

Annual calibration of equipment used to screen hearing is recommended by the U. S Occupational Health and Safety Administration (OSHA), the National Institutes of Health (NIH) and the Minnesota Department of Health to ensure the accuracy of each machine’s readings.  Midwest Special Instruments is pleased to announce that calibration sites and dates have been determined for the Spring of 2023.  It is important to pre-register machines for calibration.  You will find instructions for completing the pre-registration process below and the download links to the Right.

Information includes:

  • Calibration site locations with Dates & Times (downloadable)
  • Registration forms (downloadable)
  • Calibration Prices (on the Registration form)
  • Equipment List Form (page 2 of Registration forms document)
  • Equipment labels (page 3 of Registration forms document)


Midwest Special Instruments Contact:  Holli Glendenning,, or fax 952-808-0323