"Hearing loss" sounds like one condition, but it's really a category, and knowing which type you have changes everything about treatment. Some hearing loss can be medically corrected; some is permanent but very manageable with technology. Testing sorts one from the other.
How hearing loss is measured
Two dimensions matter. Degree, mild, moderate, moderately severe, severe or profound, describes how much louder sounds must be before you hear them, measured in decibels (dB). For reference, a faint whisper sits around 15–20 dB, a jet engine around 120 dB, and normal adult hearing detects sounds across the tested frequencies at 0–25 dB. Configuration describes which pitches are affected, most age- and noise-related loss hits high frequencies hardest, which is why "I hear but can't understand" is such a common complaint.
A complete hearing evaluation, tone testing plus speech testing, establishes both, and identifies your loss as one of three types:
Conductive hearing loss
The pathway problem. Sound isn't being conducted properly to the inner ear, the trouble lies in the ear canal, eardrum or middle ear, while the inner ear and nerve work fine. Sounds tend to seem muffled or simply too quiet, like the world's volume knob got turned down.
Common causes include complete earwax blockages, outer or middle ear infections, fluid behind the eardrum, a perforated eardrum, otosclerosis (stiffening of the middle-ear bones), or structural differences present from birth.
The encouraging news: conductive loss is frequently temporary or medically treatable, sometimes as simple as removing a wax blockage. When it's permanent, hearing aids typically work very well.
Sensorineural hearing loss
The signal problem. The most common type by far. Damage to the cochlea's hair cells, or, less often, the auditory nerve, means sound reaches the inner ear but gets converted to a degraded signal. The classic experience isn't silence but distortion: muffled-sounding speech, trouble in background noise, difficulty with clarity, often with tinnitus along for the ride.
Causes include age-related change (presbycusis), noise exposure, genetics, certain medications, infections, head trauma, or a congenital condition present from birth.
Sensorineural loss is generally permanent and can progress, so routine monitoring matters. Hearing aids are the standard, highly successful treatment, with settings adjusted over time as needs change.
Mixed hearing loss
Both at once. A conductive problem layered on top of a sensorineural one, say, longtime noise-related loss plus a new middle-ear infection. Treatment tackles each component on its own terms: medical care for what's fixable, hearing technology for what remains.
Which type is yours?
You can't tell from the inside, conductive and sensorineural loss can feel identical to the person experiencing them. One appointment settles it. Schedule a hearing evaluation and get an answer you can act on.