Tinnitus: The Sound Your Brain Is Making

TL;DR: The ringing you hear is generated by your brain rather than your ear. When damage to the inner ear cuts part of the signal reaching the hearing centers, those centers respond by turning up their own gain, the way you would turn up a radio with a weak station, and the amplified internal noise becomes a sound you hear. This explains why tinnitus is loudest in a quiet room, why it so often follows noise exposure, and why it can appear when a hearing test still reads normal, since standard tests miss the earliest damage. Some tinnitus is urgent: sound that pulses in time with your heartbeat, or that arrives in one ear alongside sudden hearing loss, needs evaluation now rather than later. For the rest, the treatments with the strongest evidence are restoring the missing input with hearing aids and retraining the response with cognitive behavioral therapy. Supplements, including ginkgo, are not supported for this by the guideline.

You notice it at night, after the house goes quiet. A high ringing, or a hiss like a television tuned to nothing, or a hum that sits behind everything. During the day it hides under traffic and conversation, and by bedtime it is the loudest thing in the room. You may have been told your hearing test came back normal, so there is nothing to find and nothing to do, and that you should try to ignore it.

That advice fails people, and it fails them because it starts from the wrong organ. What I want you to know is that tinnitus is usually a brain event rather than an ear event, and once you understand where the sound is coming from, both the strange features of it and the treatments that help start to make sense.

What is tinnitus?

Tinnitus is the perception of sound with no source outside your head. Most often it is a ringing, hissing, buzzing, or humming, steady or intermittent, in one ear or both or seemingly in the middle of the skull. It is common, affecting somewhere between 10 and 15 percent of adults, and for a smaller share it is severe enough to interfere with sleep, concentration, and mood.

The distinction that matters most clinically is between the ordinary kind and the pulsatile kind. Ordinary tinnitus is a continuous tone or noise. Pulsatile tinnitus is a whooshing or thumping that keeps time with your heartbeat, and that one is different, because a sound synchronized to your pulse usually has a physical source in blood flow near the ear. That belongs in the urgent category, which we will come back to.

Why does the brain make a sound that is not there?

This is the part that reframes everything, and it is the piece most people are never told.

Your hearing system is built to hold its output steady. The hair cells of the inner ear send signals up the auditory nerve to the brain, and the hearing centers adjust their sensitivity to keep the incoming stream at a workable level, the same way your eyes adapt when you walk into a dim room. That adjustment is called gain.

Now take some of the input away. Noise exposure, aging, and a long list of other insults damage the hair cells and the connections between the ear and the nerve, so fewer signals arrive at the brain. The hearing centers respond the way they are designed to: they turn up the gain to compensate for the missing volume. The trouble is that turning up the gain amplifies everything, including the low-level spontaneous activity that nerve cells produce on their own. Amplify that background chatter enough and it crosses into something you consciously hear. Researchers call this central gain, and it is the leading explanation for tinnitus.

Think of a radio tuned to a weak station. Turn the volume up to hear the music and you also raise the hiss. Tinnitus is the hiss, and the volume knob was turned up for a reason.

This model explains features of tinnitus that otherwise seem random. It is worse in a quiet room because there is no outside sound competing with the amplified internal noise. It often matches the pitch of your hearing loss, arriving in the frequency range where the input went missing. And it can appear after a single loud night at a show, then fade as the system settles.

Why is my hearing test normal if I have tinnitus?

Because the standard hearing test is not sensitive enough to catch the damage that starts this process, and this is one of the most useful things you can know if you have been dismissed.

A standard audiogram measures the quietest tone you can detect across the frequencies used for speech. It is a good test for what it measures and it misses two important things. First, it usually stops at 8,000 hertz, and noise damage tends to begin above that range, so early loss goes unrecorded. Second, and more importantly, the ear can lose a large share of the synapses connecting hair cells to the auditory nerve while the threshold for detecting a quiet tone stays normal. Laboratory work showed that noise exposure causing only temporary threshold shifts, the muffled hearing that recovers by the next morning, still destroyed a substantial portion of those nerve connections permanently.

This is called hidden hearing loss, and hidden is the right word: the input to the brain has dropped, the gain has gone up, and the test that was supposed to detect it reads normal. It is also why people with hidden hearing loss often struggle to follow conversation in a loud restaurant while passing a hearing test in a quiet booth.

So a normal audiogram does not mean nothing happened. It means the standard test did not capture what happened, which is a different statement and a far more useful one.

When is tinnitus an emergency?

Most tinnitus is not dangerous. A few presentations are, and it helps to know them by heart, because the window for treating some of them is measured in days.

• Sudden hearing loss in one ear is a medical emergency. If hearing drops abruptly, over hours to a day, with or without tinnitus and fullness in that ear, it needs same-day evaluation. Corticosteroid treatment works far better when started within 72 hours, and the chance of meaningful recovery falls sharply as weeks pass. This is the one I most want people to recognize, because it is frequently mistaken for wax or a cold and treated at home until the window closes.
• Pulsatile tinnitus, a whooshing that keeps time with your heartbeat, needs evaluation and usually imaging. It can come from a narrowed or malformed blood vessel, a vascular tumor, or raised pressure around the brain, and some of these causes are treatable once identified.
• Tinnitus in one ear only, particularly with hearing loss on that side, warrants imaging to rule out a growth on the hearing nerve. Guidelines recommend against routine imaging for ordinary tinnitus in both ears, and recommend it here.
• Tinnitus with neurological symptoms, such as facial weakness or numbness, severe imbalance, or double vision, needs prompt evaluation.

If your tinnitus is a steady tone in both ears that came on gradually, none of this is likely to apply to you. If it pulses, sits on one side, or arrived with a drop in hearing, do not wait to see whether it settles.

What else drives tinnitus?

Beyond the hearing loss at the center of the story, several contributors are worth checking, because some of them are reversible and most go unexamined.

• Earwax impaction is the simplest reversible cause and worth looking at first.
• Medications can generate or worsen tinnitus. High-dose aspirin and other anti-inflammatories, certain antibiotics, loop diuretics, and some chemotherapy agents are the usual suspects, and a careful medication review sometimes solves the problem outright.
• Untreated obstructive sleep apnea travels with tinnitus, and the relationship runs both ways: fragmented sleep makes tinnitus more intrusive, and an intrusive sound makes sleep worse. Treating the apnea helps the whole loop.
• Jaw and neck problems can modulate tinnitus, since sensory nerves from the jaw and upper neck feed into the same brainstem circuits as hearing. If you can change the sound by clenching your jaw or turning your head, that connection is active for you.
• Thyroid disease and iron deficiency are worth a look, since both affect the inner ear and both are easy to check and treat.
• Cardiovascular health matters because the inner ear runs on some of the smallest blood vessels in the body and has almost no reserve supply. Blood pressure, blood sugar, and lipids affect that circulation, which is one more reason to keep them in range.
• Stress and poor sleep do not cause tinnitus, and they reliably turn up how loud and how threatening it feels, which is why the sound seems to grow during hard stretches.

What helps tinnitus?

Here is where I want to be direct, because this is a field crowded with products that sell hope, and the honest evidence points somewhere specific.

The single most effective intervention for most people is restoring the missing input. If there is hearing loss, hearing aids treat the cause of the gain increase: feed the brain the signal it has been missing and the system has less reason to keep the volume up. Guidelines recommend a hearing aid evaluation for anyone with hearing loss and bothersome tinnitus, and many people find the ringing recedes as amplification improves. This is the closest thing to a mechanistic fix that we have.

The second is cognitive behavioral therapy, and I want to be careful here, because suggesting therapy for a physical symptom sounds dismissive. It is not. Tinnitus becomes disabling through the alarm response it triggers: the sound captures attention, attention amplifies it, distress follows, and the loop tightens. Cognitive behavioral therapy targets that loop directly, and it has the strongest evidence of any treatment for reducing the suffering tinnitus causes. It tends to change how much the sound intrudes rather than how loud it measures, and for most people that is the difference that matters.

Sound therapy, which uses background noise, white noise, or specialized maskers to reduce the contrast between the tinnitus and a silent room, is a reasonable addition, and it is particularly useful at night when the room is quiet and the sound has the stage to itself.

Then the honest negatives. Guidelines recommend against ginkgo, melatonin, zinc, and other dietary supplements for persistent bothersome tinnitus, because the trials have not shown benefit. They also recommend against routinely using antidepressants, anticonvulsants, or anti-anxiety medications for tinnitus itself, though treating a genuine depression or anxiety disorder alongside it is a different matter and often worth doing. Our guide to ginkgo covers where a trial may still be reasonable, and the guideline position belongs next to it.

In my practice, the turning point for people with tinnitus is usually the moment they stop hearing it as a mystery and start hearing it as a signal with a mechanism. The sound stops being evidence that something unknown is wrong, which is what made it frightening, and becomes a readout of a hearing system that lost some input and compensated. That reframe does not silence it. It reliably takes the threat out of it, and the volume tends to follow.

How Fishtown Medicine approaches tinnitus

At Fishtown Medicine, tinnitus gets a workup rather than a shrug. The first job is safety: sorting out whether this is the ordinary kind or one of the presentations that needs urgent attention, which means asking whether it pulses, whether it is one-sided, and whether hearing changed suddenly, and acting the same day when the answers point that way.

From there we look for what is driving it. That means examining the ears for wax, arranging formal audiometry rather than relying on a screening test, reviewing every medication and supplement you take for ototoxic contributors, screening for sleep apnea when the history fits, and checking thyroid, iron, and metabolic markers. Because this is direct primary care, there is time to take the history that makes sense of the pattern: when it started, what it tracks with, how it behaves at night, and what it is costing you in sleep and concentration.

Then we build the plan around what works: audiology referral for amplification when there is hearing loss, cognitive behavioral therapy when the sound has become intrusive, sound enrichment for the nights, treatment of the contributors we found, and protection of the hearing you still have. If you are in Philadelphia, work near loud rooms, or have spent years at shows on Frankford Avenue without earplugs, that history matters and it changes what we look for. The fastest way to start is to tell Dr. Ash what you are hearing.

Related at Fishtown Medicine

• Hearing Loss and Dementia Prevention - why treating hearing loss matters well beyond the ears
• Ginkgo Biloba: A Clinical Guide - what the evidence supports and where the guideline stands
• Insomnia - when the sound is what stands between you and sleep
• Sleep Disorders Care - evaluating the sleep apnea that travels with tinnitus
• Lightheadedness and Dizziness - when inner ear symptoms come together
• Advanced Tests Your Doctor Isn't Ordering - the metabolic markers behind small vessel health

Scientific References

1. Tunkel DE, Bauer CA, Sun GH, et al. Clinical Practice Guideline: Tinnitus. Otolaryngology-Head and Neck Surgery. 2014;151(2 Suppl):S1-S40.
2. Auerbach BD, Rodrigues PV, Salvi RJ. Central gain control in tinnitus and hyperacusis. Frontiers in Neurology. 2014;5:206.
3. Schaette R, McAlpine D. Tinnitus with a normal audiogram: physiological evidence for hidden hearing loss and computational model. The Journal of Neuroscience. 2011;31(38):13452-13457.
4. Kujawa SG, Liberman MC. Adding insult to injury: cochlear nerve degeneration after "temporary" noise-induced hearing loss. The Journal of Neuroscience. 2009;29(45):14077-14085.
5. Baguley D, McFerran D, Hall D. Tinnitus. The Lancet. 2013;382(9904):1600-1607.
6. Fuller T, Cima R, Langguth B, Mazurek B, Vlaeyen JW, Hoare DJ. Cognitive behavioural therapy for tinnitus. Cochrane Database of Systematic Reviews. 2020;1(1):CD012614.
7. Livingston G, Huntley J, Liu KY, et al. Dementia prevention, intervention, and care: 2024 report of the Lancet standing Commission. The Lancet. 2024;404(10452):572-628.