Your hearing aids, tested. Not just assumed to work.
Hearing aids are precision instruments, and their performance can change gradually over time in ways that aren't always noticeable. Electroacoustic Analysis (EAA) tests the device itself in a controlled environment, giving us objective confirmation that your hearing aids are meeting the specifications.
- Step 1
Setting up the test
We place your hearing aid into a calibrated test box: a small, controlled sound chamber designed to measure exactly how the device performs. No probes in the ear and nothing played to you: this test is entirely about the hearing aid itself.
- Step 2
Frequency response & output testing
The test measures how your hearing aid amplifies sound across the full range of frequencies, from low to high, and checks the maximum output the device can produce. These results are compared directly against the manufacturer's original specifications for your specific hearing aid model.
Verified against manufacturer specifications - Step 3
Distortion & internal noise analysis
EAA also checks for total harmonic distortion, which occurs when a hearing aid introduces unwanted overtones into sound, and equivalent input noise, the background noise the device itself generates. Both can affect sound quality in ways that are difficult to detect by listening to the device alone.
- Step 4
Results review & next steps
We review the findings with you in plain language. If the device is performing within specification, you have confirmation it's working as intended. If something is off, we'll identify the issue and determine whether an in-house repair or a manufacturer repair is the right course.
Completed before your fitting appointment
A test for the device, peace of mind for you.
There's a difference between sounding right and measuring right.
Hearing aids don't fail all at once. Output can shift gradually, distortion can creep in, and internal noise can increase in ways that are subtle enough to miss day to day. By the time a problem becomes noticeable, it may have been affecting your hearing for longer than you'd want.
EAA catches those changes early. At Kun Hearing, we run an electroacoustic check before every fitting, so the device is confirmed to be working properly before Dr. Kun verifies your prescription in your ear, and we repeat the check at routine intervals. That gives you objective verification that your device is functioning correctly, not just a subjective sense that things sound okay.
Frequently asked questions
Still have questions? Call us at (626) 820-9116 or send a message, and we reply the same day.
EAA measures the physical performance of your hearing aid in a controlled test box, including its frequency response, maximum output, total harmonic distortion, and internal noise. These measurements confirm whether the device is performing to the manufacturer's specifications.
Not at all. EAA is performed entirely on the hearing aid itself, not in your ear. We place the device in a calibrated test box, run the measurements, and review the results with you. It's a completely passive process from your side.
EAA is performed before every hearing aid fitting, ahead of the fitting appointment itself, and then at routine intervals. It's also the right test any time you suspect your hearing aids aren't sounding the way they should, even if you can't pinpoint exactly what's different.
We'll explain what the results indicate and walk you through your options. Depending on the finding, the next step may be an in-house repair or a manufacturer repair. You won't leave without a clear picture of what's needed.
They work together as a complete verification process. EAA is performed before your fitting to confirm the hearing aid device is functioning correctly on its own. Real Ear Measurement, at the fitting itself, then confirms it's programmed correctly for your specific ear. Neither test alone gives you the full picture: both together do.
It depends on your coverage. EAA is part of our standard care, but whether it's separately covered or billable varies by plan and by whether you're a direct-insurance, third-party, or private-pay patient. Just ask and we'll go over what to expect for your situation before your visit.