Mid-Range Microphone Comparison Calibration

Precision Calibration Coupler | 917 Option

cal microphone 9917c microphone comparison calibrator productThe Mid-Range Microphone Comparison Calibrator offers calibration to 10 kHz of both precision condenser microphones and electret array microphones according to IEC 61094-5. The calibrator is available as Option 9155D-917 for use with a Precision Sensor Calibration Workstation Model 9155D. It is also available as a standalone workstation Model K9000-917.

The Microphone Comparison Calibrator has two microphone ports—one each for a reference microphone and a test microphone (also known as Microphone Under Test). Adaptors are included for ¼” condenser microphones. These ports and adaptors are also designed for array microphones. Rather than directly exposing the microphone diaphragm to the environment, as required by electrostatic actuator techniques, the Microphone Comparison Calibrator operates with the grid cap remaining on the microphone. This reduces the risk of damage to the microphone diaphragm, and enables calibration of microphones with permanent grid caps.

cal microphone 9917c microphone comparison calibrator product

9917C Microphone Insertion

cal microphone 9917c microphone comparison calibrator product

9917C and SmartSine Calibration Driver


  • Validate microphones over a broad frequency range in the field or in the lab
  • Simple, fast broadband acoustic calibration
  • Reduces damage risk by leaving grid cap on
  • Adheres to international standards
  • Compatible with both condenser and array microphones


  • Noise source identification
  • Automotive NVH
  • Flight test acoustics
  • Vibro-acoustic testing
  • Consumer and white goods product development
  • Accredited metrology labs


Download Datasheet | Download Specification Sheet

9155D-917 Option
Frequency Range20 Hz - 10 kHz
Measurement Uncertainty at Reference Frequency0.5 dB
Standards ComplianceIEC 61094-5
Measurement TechniqueComparison
Measurements SupportedSensitivity, frequency response
Actuator Model9917C

Microphones experience the same acoustic input created by the internal actuator of the Microphone Comparison Calibrator. The internal actuator creates an acoustic output proportional to a voltage input. This voltage input is provided by the user to the BNC jack on the calibrator. By using the known sensitivity of the reference microphone, and comparing the voltage output of both microphones, the sensitivity of the test microphone may be calculated.