Electro-acoustic ear simulator

The ER-75 electro-acoustic ear simulator is the perfect solution for performing objective validation of audiometers and audiometric equipment, ensuring optimum performance when testing for hearing loss.

At only 500g (1.1lbs), battery powered and with a lightweight and compact design, the ER-75 can be used for both static and mobile requirements. Validation includes audiology booths and interconnecting booth cables to provide optimum performance when conducting screening audiometry tests for hearing loss. 

  • Automatic audiometer validation in under 5 minutes
  • Repeatable thresholds over 0.25-8kHz
  • Battery powered for mobile use
  • Compact, lightweight and portable

Brochure Manual Get a quote

Fast and efficient

Instrument validation can be completed in under 5 minutes, allowing users to identify if the audiometric facility (audiometer, booth, headset and all associated cables) are performing in an accurate manner. Any changes to the measurements can then be identified by comparing with previous results and remedial actions can be taken to ensure test accuracy.



Tests provide repeatable thresholds over the frequency range of 0.25kHz to 8kHz, thereby simulating the patient response and enabling the user to identify hearing loss issues. This ensures compliance at all hearing test frequencies used in an actual hearing assessment.



As the simulator is completely automatic, validations are carried out using standard and Audiocup configured audiometry headphones (connected to the audiometer), which are placed over the ER-75’s built-in microphones.


Please note: Image shows ER-75 with a standard audiometric headset.

Frequently asked questions

  • What is an electro-acoustic ear simulator?

    As its name already suggests, this device uses electrical inputs to simulate an acoustic environment. In this case it is simulating an ear, to perform hearing tests on.

    What is the recommended usage of an ear simulator?

    At Amplivox we recommend performing an audiometer calibration validation every morning before starting into your daily routine. 

  • What is the benefit of using an electro-acoustic ear simulator?

    The device is simulating a normal air conduction hearing threshold in dBHL. When connected to your audiometer, an automated test can be conducted, testing this stimulated normal hearing threshold.

    If your audiometer succeeds identifying the normal hearing simulation, you audiometer calibration is validated as correctly. If the measured hearing test is off and not according to a normal pure-tone audiogram, you are advised to check your audiometers calibration.