Advertise on podcast: Earvangelism

Deep in your cochlea, alongside the cells that detect sound, sits a resident population of immune cells called macrophages. They roam around patrolling for threats, clearing debris, managing inflammation. Every major organ has its own version. The brain's is called microglia. In this mini episode, I explain a striking discovery: that the genetic program running the ear's immune cells and the brain's are exactly the same, which raises the question of whether hearing loss and neurodegeneration are two expressions of one upstream cause!

Somewhere in your head, right now, there's a battery: a genuinely unusual electrical charge your inner ear builds and maintains for your entire life, just to make sure a whisper never gets missed. In this episode: what that battery is, why it's stranger than almost anything else in your body, and why a truly brutal week at work might actually leave a trace on what you hear.

There are cells inside your ear, physically changing shape thousands of times a second, stretching and contracting perfectly in time with whatever sound is around you. In this episode of Earvangelism, I break down outer hair cells: the only sensory cells in your body that work backwards, turning an electrical signal back into movement, and using that movement to amplify the very sound that triggered them. This mind-boggling biology is exactly what lets us test a newborn baby's hearing without needing a single word from them. Nowhere else in the body will you find anatomy quite this wild. Tune in!

Why does a whispered name wake you when a thunderstorm doesn't? I follow a sound from the air into the brain and introduce you to the bouncer you have in your brain, deciding what's allowed through to the "CEO", your conscious mind. While you sleep, that checkpoint shuts almost everything out. Except one fast, coarse system never clocks off, and it has a direct line to the brain's threat-detection centre, the amygdala.

There's a tinnitus device on the market right now that uses a part of your body you'd never suspect: your tongue. In this episode of Earvangelism, I break down Lenire: why the trigeminal nerve in your tongue and your auditory pathway share brainstem wiring, and what the actual clinical evidence does and doesn't show. If you've ever wondered how the ear connects to systems that have nothing to do with hearing, this one's for you.

Ten years ago, a boy with dyslexia, ADHD and severe arithmetic difficulties progressed faster than every other child I was working with. After going through an intervention aimed at how he processed sound (not how he heard it). In this episode, I explain three specific, overlooked auditory factors behind learning difficulties: frequency-specific sound sensitivity, the "right ear advantage," and frequency discrimination, and why passing a standard hearing test says almost nothing about whether the ears are involved.

So often once patients go and see a consultant, they are told that beyond what has been prescribed or attempted, there's nothing left to do. This interview was fascinating because it demonstrates several techniques that can be used, and we look specifically at tackling Eustachian Tube Dysfunction. Did you realise that it could be linked to your jaw and your skull bones? And there's a technique for blocked ears with a name so cute you'd never guess what it actually involves (I found out first hand!). I speak with chiropractor Dr. Adam Fields about everything conventional ENT care doesn't tell you about this condition: trigger points that spike under stress, why mouth breathing sabotages your ears, and a tinnitus case that turned out to be hormonal. Fascinating stuff! Check out Dr. Fields' details and get in touch for more information. About Dr. Adam Fields, DC Dr. Adam Fields is a practicing chiropractor in Northern California specializing in non-invasive structural and cranial care above the neck. In his clinic, he helps people daily with complex head, ear, and airway challenges—with a primary clinical focus on Eustachian Tube Dysfunction (ETD), tinnitus, inner ear pressure, Meniere’s disease, and TMJ disorders. Dr. Fields utilizes specialized, gentle modalities including Endonasal Cranial Adjusting and the Muncie Technique alongside posture correction, lifestyle modification, and targeted muscle work. He also educates a global audience of over 300,000 subscribers on YouTube, empowering people with step-by-step self-care strategies.Practice & Consultations Los Gatos Practice: 16615 Lark Ave, Suite 201, Los Gatos, CA 95032 Telehealth Consultations: 1-on-1 remote consultations available globally Connect & Book with Dr. Adam Fields Looking for personalized care or a remote consultation? Book In-Person or Telehealth Visits: Visit fieldsfamilychiro.com and click "Book Online" Official Website: https://fieldsfamilychiro.com/ YouTube: https://www.youtube.com/@dradamfields Instagram: https://www.instagram.com/dradamfields/ Facebook: https://www.facebook.com/DrAdamFields/

Some babies pass their newborn hearing test perfectly, and yet still don't respond to sound. The cause, in a small number of cases, is a single gene: OTOF. Its instructions are too long to fit inside a normal gene-therapy virus, so researchers split it in half and let the two pieces recombine only once they're both inside the right cell. I explain how it works, and what this means for the ongoing quest to restore hearing.

Hearing loss has been linked with causing dementia for a long time. On 15 July 2026, the WHO updated its dementia guidance for the first time since 2019, naming hearing loss a core risk factor and recommending hearing aids, citing roughly 7% of dementia cases. Days earlier, a peer-reviewed paper argued the causal story is weaker than it looks, raising reverse causation, shared confounders, survival bias, and a measurement gap between how well we detect hearing loss versus early cognitive decline. I break down both sides, and why I recommend hearing aids either way.

Is there really nothing new to try for tinnitus? The answer emerging from research right now is... all hope is not lost! There's still no known universal cure, but the pipeline of things being tested is more active than many realise. In this episode, I break down one recent example: transcutaneous auricular vagus nerve stimulation, reaching one of the body's most powerful nerves through a single spot on the outer ear. In a small pilot study, thirteen people with chronic tinnitus reported less distress and less depression, and their brains showed a measurable, scanned change. It's not the cure. But it is proof the research isn't standing still, and it won't be the last promising lead we hear about!

Your inner ear has its own oestrogen receptors. I know, absolutely crazy. They help explain why men generally lose hearing earlier and more severely than women. This year, researchers identified one of the genes behind that protection. The expected result: males would suffer more, since they have less estrogen to begin with. The ACTUAL result: females came out significantly worse. In humans, the same gene is linked to hearing status only in women, but only after menopause. The takeaway: women's ears age and respond to certain genes than men's!

Almost every organ in your body is built by one type of embryonic tissue. Your middle ear is the exception: built from all three, plus a fourth crew of cells that travelled in from your developing brain to form your smallest bone. That shared construction history makes your ear old friends with your heart, face, and kidneys, which is why certain syndromes cluster ear anomalies with heart and kidney anomalies in the same patients. This begs the question: what other connections haven't we found yet that the ear could reveal?

How could looking at someone's earlobe tell you more about their heart than a conversation ever could? The answer emerging from research is... a crease. In this episode, I break down Frank's sign: the diagonal fold in the earlobe first documented in 1973 and now statistically linked to coronary artery disease, present in 64% of cardiovascular deaths versus 36% of others, and up to 8x more common in critically blocked arteries. Turns out your ear's been reporting on your heart this whole time. You will never look at an ear the same way again. Including your own.

Why does the same dose of a hearing-damaging drug destroy one person's hearing and leave another's intact? The answer emerging from research is... the gut. In this episode, I break down the gut-mito-ear axis: the newly proposed framework connecting your microbiome, your blood-labyrinth barrier, and the vulnerability of your cochlea. It turns out the gut-brain axis has a sibling nobody's been paying attention to until now!

A sound lands in your body before you've understood what it was. A creak in the night. A two-note film score. A tone of voice that tells you something is wrong before the sentence is finished. That sequence: feel first, think second is your auditory system doing something extraordinary. Your ears have two routes to the brain. One goes to the conscious, reasoning mind. The other goes straight to your emotional alarm system, arriving before language, before logic, before you've identified what you just heard. In this episode, we're talking about the low road: why sound reaches your feelings before your brain catches up, and what it means that your ears are briefing your emotional system constantly, without you knowing it.