Awareness
LSTN Editorial Team · Editorially overseen by Dan McCoy
Tinnitus (ringing, buzzing, or hissing with no external source) affects about 15% of adults. In most cases it co-occurs with hearing loss, and the two are symptoms of the same underlying problem. Understanding why helps explain what can and can't be done about it.
Tinnitus is the perception of sound without an external source. It manifests as ringing, buzzing, hissing, humming, clicking, or whooshing. The exact character varies between individuals and over time. It is a symptom, not a disease.
About 15% of adults in the US experience tinnitus. For most, it's mild and intermittent. For an estimated 2–3%, it's severe enough to significantly disrupt sleep, concentration, and daily functioning.
The most important thing to understand: tinnitus is usually generated in the brain, not the ear. The ear is where the problem begins. The sound is produced and experienced centrally.
Cochlear hair cells serve two functions simultaneously: they detect incoming sound, and they suppress internally-generated phantom neural activity. When hair cells are damaged by noise, aging, ototoxic medications, or other causes, they stop performing both functions.
The auditory cortex, now receiving reduced input from the damaged frequency region, partially compensates by increasing its own gain, essentially turning up the sensitivity of its internal circuits. This amplified internal neural activity is perceived as tinnitus.
This mechanism explains why tinnitus most commonly matches the frequency of the hearing loss. High-frequency cochlear damage → high-pitched tinnitus. The brain is attempting to compensate for missing signal and overshooting.
There is no cure for most tinnitus. This is a meaningful distinction from hearing loss, where amplification addresses the functional deficit directly.
Hearing aids help many people with tinnitus because they restore external sound to the damaged frequency region, reducing the brain's compensatory internal gain. Some modern aids include tinnitus masking features: a low-level broadband or notched sound stimulus that provides relief without eliminating the underlying signal.
Tinnitus retraining therapy (TRT) and cognitive behavioral therapy (CBT) are the most evidence-supported approaches for severe tinnitus. Neither eliminates the sound, but both can significantly reduce how distressing it is, by changing the emotional and attentional response rather than the auditory signal itself.
Tinnitus in one ear only, pulsatile tinnitus (that beats with the heartbeat), or tinnitus accompanied by sudden hearing loss are red flags warranting prompt medical evaluation, sometimes urgently. These can indicate a vascular abnormality, middle ear pathology, or acoustic neuroma.
My team treated one-sided tinnitus as a referral indicator, not a starting point for watchful waiting. Patients would often explain it away: a concert, a bad week, stress. Sometimes they were right. But unilateral tinnitus is one of the clearest prompts in audiology for an evaluation that can actually find something treatable.
Bilateral tinnitus that has been stable for several months, associated with symmetrical hearing loss, is typically benign. It is real, and it can be evaluated and managed by an audiologist.
A full audiological evaluation is the right starting point regardless of presentation. It will establish whether hearing loss is present, at which frequencies, and what the clinical relationship is between the audiogram and the tinnitus character.
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