e3 Diagnostics

Looking for a hearing screening and diagnostic instrument to perform otoacoustic emissions tests in patients of all ages? We have plenty! Browse our selection of fast, intuitive, and reliable OAE machines. With over 20 devices from seven manufacturers, you’re bound to find an OAE audiology machine that suits your testing needs.

A reliable OAE machine is vital to any hearing professional's toolbox. That's why we want to make sure you are equipped with the right otoacoustic emission device for your practice. From basic otoacoustic emissions machines to devices that simultaneously conduct DPOAE and TEOAE screenings, we have the otoacoustic emissions test technology to determine the function of your patients' inner ears. With 30 offices spread across the U.S., e3 Diagnostics can often provide same-day service to support your OAE hearing tests.


Grason-Stadler Corti™

A portable and battery-operated diagnostics and screening instrument, the GSI Corti provides reliable OAE measurements in patients of all ages.

Fast and easy to use, this OAE hearing screener offers maximum flexibility through pre-defined protocols for DPOAE and TEOAE measurements.


Want to learn more about the Corti? Visit the Grason-Stadler website for a full breakdown of the features and benefits, along with a variety of educational materials.

Corti page


Grason-stadler Corti Video

The GSI Corti™ is a portable, battery-operated diagnostic and screening instrument

Request a Quote

We understand that you have a choice when it comes to choosing your equipment and are dedicated to providing you with the highest quality instrumentation available.Contact us now for your free, no obligation quote and discover why we are the preferred Authorized Distributor and Service Provider to the world’s leading manufacturers.  (Completing our online form does not sign you up for electronic advertising.)


Specifications Measurement Types

Screening and Diagnostic Testing

  • DPOAE: 1.5 to 12 kHz, 40 to 70 dB SPL
  • TEOAE: 0.7 to 4 kHz, 83 dB pe SPL


  • Multiple Diagnostic and Screening Configurations
  • Sharp, intuitive color screen display
  • Reliable 15 hour battery life
    Powerful DPOAE testing with 12 frequencies, up to 12 kHz
  • Full color reporting and optional, fast thermal printouts
  • OAE Probe that never requires cleaning
  • Charging and data transfer via the optional Cradle
  • Convenient testing for patients with PE tubes
  • Optional data storage of up to 250 tests
  • Protected data via non-volatile memory
  • Low cost, disposable ear tips
  • Export options for Pass/Refer results to OZ eSP™ and HiTrack™
  • Meets screening and diagnostic CPT code reimbursement requirements
  • Multiple, easily selected language options
  • Handy 12-month Corti calibration reminder