Degrees of Hearing Loss The primary levels of hearing loss look like this, as defined by the American Speech-Language-Hearing Association (ASHA): ASHA Hearing Loss Decibels (dB) Normal Up to 15 dB lost Slight 16 to 25 dB lost Mild 26 to 40 dB lost Moderate 41 to 55 dB lost Moderately severe 56 to 70 dB lost Severe 71 to 90 dB lost Profound 91+ dB lost How We Test Hearing Aids AccordionItemContainerButton LargeChevron I configured and qualitatively tested each device in several settings, including my home, outdoors, and crowded environments, to see how well they helped treat my mild hearing loss while more deeply evaluating the user experience.