A:Yes, Eargo can adjust the levels of your Eargo Neo HiFi hearing aids based on your hearing test. The company provides a Personal Hearing Guide that allows you to take an online hearing test and upload your results. Eargo's licensed hearing professionals will then review your test results. Program your hearing aids to fit your unique hearing needs. They will fine-tune your hearing aids to your right hearing aids' settings. It Can adjust the levels of amplification for each ear individually.