Huberman Lab Podcast Episode Summary

Episode: Protect & Improve Your Hearing & Brain Health | Dr. Konstantina Stankovic
Date: October 13, 2025
Host: Andrew Huberman, Ph.D.
Guest: Dr. Konstantina Stankovic, Chair, Department of Otolaryngology, Head and Neck Surgery, Stanford School of Medicine

Overview

This episode centers on the science of hearing — how our auditory system works, the consequences of hearing loss beyond auditory deficits, the strong connection between hearing and brain health (notably dementia), and what individuals can do to protect and even improve their hearing throughout life. Dr. Stankovic brings expertise spanning clinical practice, auditory neuroscience, and the links between sensory health and overall wellbeing.

Key Topics and Insights

1. The Scope and Impact of Hearing Loss

[00:00–07:43]

• Prevalence and Stigma:

  • Hearing loss affects 1.5 billion worldwide, disabling 500 million; projections reach 2.5 billion by 2050 ([00:10]).
  • Society stigmatizes hearing loss. Vision aids are normalized (glasses) while hearing aids often are not — and hearing aids do not fully restore function ([04:12]).
  • “For those who have problems with their vision, they wear glasses... However, that's not the case for hearing loss... hearing aids... don't restore hearing back to normal.” – Dr. Stankovic ([04:12])

• Hearing Loss and Cognition/Dementia:

  • Mounting evidence for strong links between hearing loss and dementia ([00:00]; [79:57]).
  • Even subtle deficits can lead to focus issues, cognitive impairment, and social isolation.
  • “Our ability to hear clearly in many ways drives our ability to think and engage with the world.” – Andrew Huberman ([00:38])

2. How Hearing Works: The Auditory System

[07:43–15:26]

• Anatomy & Sensitivity:

  • The cochlea, our organ of hearing, is minute — “the size of Lincoln's upper face on a penny” ([07:43]).
  • “It is the most sensitive sensory organ. It can detect displacements that are on the order of the diameter of a hydrogen atom.” – Dr. Stankovic ([08:13])
  • The “hair cells” in the cochlea have nothing to do with head hair; they sense micro-movements ([04:12]).

• Mechanical to Electrical Signal Transduction:

  • Sound travels → vibrations move ossicles → fluid movement → hair cell stimulation → neural signal to brain ([04:12]).
  • Two types of hearing loss: conductive (mechanical transmission), and sensorineural (inner ear damage).

• Frequency & Place Coding:

  • The cochlea is “tonotopic” — high frequencies at the base, low at the apex.
  • “If you have a trained violinist, if they move their finger by only a micron... the ear can perceive that as a change in pitch.” ([09:23])

3. The Auditory System, Emotion, and Memory

[12:27–31:13]

• Sound & Emotion:

  • Strong interface between auditory and limbic (emotional) systems — explains music’s impact and debilitating effects of tinnitus ([24:38]).
  • “Hearing is the fittest for the reception of the arts, sciences, and disciplines.” – Francois Rabelais via Dr. Stankovic ([12:27])

• Tinnitus (Ringing in the Ears):

  • A “phantom sound” produced by the brain in response to reduced sensory input (like phantom limb pain) ([24:38]; [45:17]).
  • Severe in some; can lead to disability and even suicidality.

• Auditory Memories:

  • Deaf individuals can “hear” musical hallucinations before cochlear implantation; after regaining hearing, these hallucinations subside ([30:04]).
  • “Those musical hallucinations go away.” – Dr. Stankovic ([30:04])

4. Science-Backed Protections & Interventions

[32:47–47:43]

• Noise Exposure and Damage:

  • Loud environments and headphones increase early onset hearing loss ([01:28]; [32:47]).
  • Thresholds:
    • 80 dB safe for 8 hrs.
    • For every 3 dB increase, halve the exposure time ([36:09]).
    • Concerts commonly 110–120 dB (high risk).
    • “For every 3 decibel increase in sound intensity, you have to half the time exposure that's safe.” ([36:09])

• Practical Protection Strategies:

  • Earplugs: Always wear at concerts/noisy settings; choose proper FIT and dB rating ([38:49]).
  • Magnesium Supplementation:
    • Magnesium shown to protect against noise-induced hearing loss, especially magnesium threonate ([38:49]; [42:23]).
    • “Studies have shown that magnesium can protect against noise induced hearing loss... those who took magnesium beforehand had less hearing loss.” ([38:49])
    • Food sources (nuts, fish, green vegetables) preferred; supplementation when dietary intake is insufficient ([44:01]).

• Other Interventions:

  • Behavioral: Avoid “two-hit” noise exposures (e.g., back-to-back loud events) ([69:51]).
  • Tinnitus: Amplification (hearing aids) and cognitive behavioral therapy are the only proven treatments ([58:44]).

5. Diagnosing and Understanding Hearing Loss

[49:55–56:07]

• Challenges of Diagnosis:

  • Standard (audiogram) tests may miss significant neural loss (“hidden hearing loss”) ([32:47]; [79:57]).
  • Genetic testing: Only 50% definite answers; AI is improving diagnostic yield ([49:55]).

• Complexity and Subtyping:

  • Terms like “tinnitus” and “sensorineural hearing loss” cover a broad range of underlying conditions ([45:17]; [56:07]).
  • Personalized approaches and subtyping are key for future research and treatment.

6. Everyday Recommendations & Risk Factors

[65:40–70:00]

• Safe Headphone Use:

  • “If anyone can hear what you are listening to, who is standing by you? It's too loud.” – Dr. Stankovic ([67:13])
  • Regulations on volume differ by country; the U.S. allows higher max volumes on devices ([65:40]).
  • “Children are definitely more vulnerable” to hearing loss from noise ([68:00]).

• Genetic & Environmental Factors:

  • Not everyone exposed to the same noise develops damage—genetics play a big role ([68:00]).
  • Men typically experience hearing loss earlier, but after menopause, women’s hearing declines more rapidly ([116:21]).

• Drugs & Environmental Toxins:

  • Regular NSAID use (ibuprofen, acetaminophen—more than twice/week) increases risk for reversible hearing loss ([120:28]).
  • Some antibiotics, diuretics, erectile dysfunction drugs, and heavy metals are ototoxic ([120:56]; [123:16]).
  • Micro/nanoplastics and endocrine disruptors (environmental chemicals) are under study ([123:16]).

7. Hearing Loss and Brain Health

[79:57–86:27]

• Link to Dementia:

  • Hearing is foundational for emotional health, relationships, and cognitive health.
  • Social isolation from hearing loss leads to increased risk for dementia; estimated societal costs near $1 trillion/year ([85:54]).
  • “Hearing loss leads to social isolation, to depression and cognitive decline.” – Dr. Stankovic ([85:10])

• Improving Diagnostics:

  • “Speech in noise” tests (not standard audiograms) may better flag people at risk ([79:57]).
  • Advances in hearing aid tech, including AI, are improving outcomes in complex settings like cocktail party auditory scenes ([87:48]).

8. Auditory System Plasticity and Enrichment

[134:26–137:38]

• Lifelong Brain Plasticity:
  • Training via music or language boosts brain plasticity and auditory function, even improving cochlear implant outcomes ([135:55]).
  • “The more you train your brain... the better it responds when challenged.” – Dr. Stankovic ([137:38])
  • Music is a uniquely human, universal cultural trait. Auditory enrichment supports social and cognitive health.

9. Memorable Quotes and Moments

• “Deafness is a worse misfortune [than blindness] because it separates you from people as opposed to things.” – Helen Keller, via Dr. Stankovic ([12:27])
• “Our ability to hear clearly in many ways drives our ability to think and engage with the world.” – Andrew Huberman ([00:38])
• “If you’re going to a loud concert… definitely wear earplugs… and you have to put them in correctly, because if they don’t fit in, it doesn’t matter what the number says, they’re not protecting you.” – Dr. Stankovic ([38:49])
• “If anyone can hear what you are listening to, who is standing by you? It’s too loud.” – Dr. Stankovic ([67:13])
• “There are tribes in Africa where they’re not exposed to modern loud environments and they have normal hearing even into their 80s.” – Dr. Stankovic ([119:15])
• “Social isolation from hearing loss leads to increased risk for dementia; estimated societal costs near $1 trillion/year.” ([85:54])

Timestamps of Notable Segments

| Segment | Timestamp | Speaker | |---------------------------------------------|---------------|--------------------------| | Hearing loss: scope & cognition link | 00:00–01:28 | Dr. Stankovic, Huberman | | Anatomy of hearing, cochlea | 07:43–09:23 | Stankovic | | Sound, frequency/place coding | 12:27 | Stankovic | | Music, emotion, tinnitus mechanisms | 24:38–32:47 | Stankovic, Huberman | | Damage from loud noises, thresholds | 32:47–47:43 | Stankovic, Huberman | | Magnesium as protector (before noise) | 38:49–44:01 | Stankovic, Huberman | | Why hearing aids / cochlear implants matter | 30:04–32:47 | Stankovic, Huberman | | Diagnosing & hidden hearing loss | 49:55–56:07 | Stankovic, Huberman | | Drug/environmental risks | 120:28–124:56 | Stankovic, Huberman | | Dementia and social isolation | 79:57–85:54 | Stankovic, Huberman | | Brain plasticity & enrichment | 134:26–137:38 | Huberman, Stankovic |

Actionable Takeaways & Science-Based Tools

1. Protect Your Hearing:

• Avoid or reduce exposure to loud noise environments, especially for children
• Wear properly fitting earplugs at concerts, construction, or other loud events
• Use headphones at the lowest effective volume; if someone else can hear your headphones, it’s too loud

2. Magnesium Supplementation:

• Consider magnesium, ideally through diet (seeds/nuts/fish/leafy greens)
• Magnesium threonate may offer additional protection (research ongoing)

3. Lifestyle Choices:

• Minimize use of NSAIDs unless necessary
• Beware of ototoxic medications/chemicals (consult healthcare professional if concerned)
• Avoid exposure to plastics (especially with hot foods)

4. Psychosocial & Cognitive Support:

• Engage in music, learning, and social interaction to maximize auditory system plasticity and brain health
• For those with hearing loss/tinnitus: use hearing aids if indicated, cognitive behavioral therapy, and seek evaluation for new/serious symptoms

5. Children and Vulnerable Populations:

• Extra caution for young people—auditory system is more easily damaged
• Ensure schools and public events are monitoring noise levels

Closing Thoughts

The conversation underscores that caring for one’s hearing is integral to long-term brain health, emotional wellbeing, and quality of life. Interventions are both simple (noise avoidance, hearing protection, healthy diet) and, for those affected, rapidly evolving in sophistication. Early action, education, and social support remain critical as science races to further understand and treat auditory disorders.

"What's good for your body is good for your hearing." – Dr. Stankovic ([46:30])

For more resources on Dr. Stankovic’s work and strategies for hearing health, see the episode links and Stanford Otolaryngology’s site.

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