Why Hearing Loss and Tinnitus Often Happen Together

Ringing or buzzing in the ears is often what first makes people think about their hearing. Many assume that sound is their hearing loss, or that tinnitus and hearing loss are two names for the same problem. They are separate conditions with a shared starting point, and understanding how they connect makes the next step much clearer.

Two Different Conditions With a Common Origin

Hearing loss is a reduced ability to hear sound, ranging from mild to profound, in one ear or both. Tinnitus is the perception of sound when no outside source is present. People describe it as ringing, buzzing, humming, clicking, or hissing, and it can be constant or come and go.

Put simply, hearing loss takes sound away, while tinnitus adds sound that isn't there. Because both frequently begin in the same part of the inner ear, they often show up together.

What Happens Inside the Cochlea

Deep in the inner ear sits the cochlea, a small, snail-shaped structure lined with thousands of tiny sensory cells called hair cells. Sound sets the fluid inside the cochlea in motion and bends the hair cells, which convert that movement into electrical signals that travel along the auditory nerve to the brain. Different hair cells respond to different pitches.

Hair cells can be damaged by loud noise, aging, certain medications, and some medical conditions, and in humans they don't grow back. When a group of them stops working, the brain receives weaker signals for the pitches those cells used to carry. That is hearing loss.

Why the Brain Fills In the Silence

One leading explanation for tinnitus is that the brain responds to this missing input by turning up its own sensitivity, much like raising the volume on a radio with a weak signal. Researchers call this increased "central gain." As the auditory system strains to pick up sounds it's no longer receiving, it can generate activity of its own, which the brain perceives as sound.

This helps explain why tinnitus is often heard at a pitch near the range where hearing has declined, and why many people notice it more at bedtime. It's also why audiologists treat tinnitus as a symptom and look for the underlying condition driving it.

Tinnitus With or Without Measurable Hearing Loss

Tinnitus and hearing loss often appear together, and each can also occur on its own. Some people hear ringing even though their hearing test falls in the normal range.

A standard hearing test checks a specific set of pitches, and early damage can start at very high frequencies outside that range. Animal research has also shown that loud noise can damage the connections between hair cells and the auditory nerve before any change appears on a standard audiogram, a pattern sometimes called hidden hearing loss. Tinnitus can also stem from earwax blockages, ear infections, jaw (TMJ) problems, head or neck injuries, and certain medications.

Sudden hearing loss, or tinnitus that comes with dizziness, needs prompt medical attention at either an ENT or an urgent care. Tinnitus that pulses with your heartbeat or appears in only one ear should also be evaluated.

How to Tell Whether You Have Hearing Loss, Tinnitus, or Both

The sounds you hear and the sounds you miss can be hard to sort out on your own, and a comprehensive hearing test gives clear answers. At Evanston Audiology, the evaluation begins with a conversation about your medical history, medications, noise exposure, and the situations where hearing feels hardest. We examine your ears with an otoscope to check for earwax or other blockages, then use pure-tone, speech recognition, and bone conduction testing to measure how each ear hears across a range of pitches. We review your audiogram with you so you can see exactly where your hearing stands.

If the test shows hearing loss, treating it is often one of the most helpful steps for tinnitus too. Hearing aids restore some of the sound the brain has been missing, and many current models include sound therapy features for tinnitus relief. If your hearing is normal, the test still provides a useful baseline.

Schedule a Hearing Test for Tinnitus in Evanston

If you're living with hearing loss and tinnitus in Evanston, a hearing test is the best place to begin. Evanston Audiology is a family-run practice with deep roots in Evanston and Chicago's north side. Our audiologist, Dr. Kate Dunckley, completed her doctorate in Audiology and Hearing Sciences at Northwestern University. Our tinnitus management services include hearing aid fittings and sound therapy, so the team that tests your hearing can also help you manage what you're hearing.

Call 847-869-9433 or visit us at 1811 Benson Ave, on the corner of Benson and Clark, to schedule your hearing test.