Audiometer Calibration and Electro-acoustic Test System by Larson Davis

Larson Davis AUDit System 824 Audiometer Calibration


Audio Calibration Download from John Morris Industrial

Larson Davis audiometer calibration systems combine the power and versatility of the System 824 real time analyser with AUDit™ software to create a complete, portable audiometer test and calibration solution. Standard audiometer tests can be performed manually on the sound level meter or automatically with AUDit™ software which controls the sound level meter to run a full battery of audiometer performance and accuracy tests. For interfacing with the wide variety of audiometer transducers used, Larson Davis offers NBS 9-A, IEC 60318 and other couplers as well as an extremely practical artificial mastoid. The combination of AUDit™ and the 824 is a field ready solution for fast, comprehensive audiometer calibration.

System 824: Electro-acoustic analyser and precision SLM

Level, frequency, FM, and pulse measurements are only some of the capabilities of the System 824 real time analyser when fitted with 824-AUD firmware. Narrow-band FFT and real time 1/3 octave analysis make measurements such as THD and ambient noise easy and accurate. AUDit™ PC Software automates the test process, walking you through the complete calibration process.

After the test procedure you can easily print pass/fail reports and calibration certificates. Data can also be exported to Microsoft® Excel.


  • Audiometer testing
  • Audiometer calibration
  • Earphones and hearing aid testing
  • Electro-acoustic testing
  • Audiometer certification

Typically Used in:

  • Clinics and hospitals
  • Universities and Research Programs
  • Workplace Hearing Conservation Programs

Audiometer Calibration Features

  • Full line of artificial ear couplers and accessories including the new AEC201-A, IEC 60318-1:2009 Ear Simulator, the AMC493B Artificial Mastoid, and the new AEC202, AEC203, and AEC204 insert earphone and hearing
    aid couplers. 
  • Verify audiometers quickly and accurately under computer control with exhaustive tests based on limits in the ANSI S3.6-2004 Specification for Audiometers
  • Test virtually every type of transducer such as supra-aural, extended range circumaural, bone vibrator, hearing aid, insert earphone, and speaker
  • Automatically correct RETSPLs, microphone, coupler, and all other response adjustments using AUDit™ software
  • Perform level and frequency adjustments during audiometer tests
  • Qualify audiometric booth ambient noise with real time 1/3 octave analysis and fast pass/fail results (MPANL)
  • Store and recall tests in databases; query databases by audiometer, technician, date, etc.
  • Print custom reports and certificates for your clients or your archives

Learn How to Properly Calibrate Your Audiometer

To find out more about a Larson Davis System 824
Contact our John Morris Industrial team
Phone toll-free: 
AUS 1800 251 799 and NZ 0800 651 700


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