Protect & Improve Your Hearing & Brain Health | Dr. Konstantina Stankovic
Dr. Konstantina Stankovic, Professor and Chair of Otolaryngology at Stanford School of Medicine, discusses hearing loss, its link to cognitive decline, and tinnitus. She shares science-backed protocols to protect hearing, risks to avoid, and treatment options.
Deep Dive Analysis
23 Topic Outline
Hearing Loss Statistics and How Hearing Works
Types of Hearing Loss: Conductive vs. Sensorineural
The Cochlea: Sensitivity and Mechanics of Sound Perception
Sound Waves, Frequency, and Communication
Sound Projection and Ear Anatomy
Sound, Emotionality, and Tinnitus
Painful Sounds: Hyperacusis and Phonophobia
Concerts, Ringing Ears, and Hidden Hearing Loss
Magnesium for Hearing Protection
Tinnitus: Causes, Evaluation, and Treatment
Headphones, Safe Sound Levels, and Vulnerability
Compounded Damage and Earplugs
In-Utero Hearing and Sound Pollution
Hearing Loss, Dementia, and Cognitive Decline
Lip Reading and AI-Enhanced Hearing Aids
Sleep, Earplugs, and Superior Semicircular Canal Dehiscence
Hearing, Balance, and Sound Therapy
Music, Dance, and Cochlear Implants
Hearing, Social-Cognitive Development, and Mental Health
Gender Differences in Hearing and Environmental Toxins
Avoiding Regular NSAID Use and Hair Cell Regeneration
Adult Auditory Plasticity and Sensory Integration
Preventing Hearing Loss: Recap
10 Key Concepts
Conductive Hearing Loss
This type of hearing loss affects the ability of sounds to be conducted to the inner ear, potentially due to issues like a hole in the eardrum, fluid behind the eardrum, or frozen hearing bones. It often has surgical or non-surgical treatment options like hearing aids.
Sensorineural Hearing Loss
This more common type of hearing loss originates from the inner ear, specifically involving damage to the incredibly delicate sensory hair cells. It has been challenging to study and treat due to the inner ear's tiny size and location.
Cochlea
The cochlea is the snail-shaped organ of hearing located deep within the densest bone of the skull. It's responsible for converting mechanical vibrations into electrical signals the brain can interpret, encoding high frequencies at its base and low frequencies at its apex.
Hair Cells
These are incredibly delicate sensory cells within the inner ear that, when deflected by fluid motion, lead to the flow of ionic current and excitation of the auditory nerve. They are crucial for hearing and are highly sensitive to even sub-angstrom displacements.
Mechanoelectrical Transduction
This is the fundamental process occurring in the inner ear where a mechanical stimulus (sound vibrations) is converted into an electrical signal. This electrical signal is then transmitted via the auditory nerve all the way to the brain for perception.
Hidden Hearing Loss
A form of hearing damage, often caused by loud noise exposure, where the synapses connecting sensory cells to neurons are damaged or destroyed. Standard audiometric tests may show normal hearing, but individuals report difficulty hearing in noisy environments or experience tinnitus.
Tinnitus
A phantom sound, such as ringing or buzzing, produced by the brain, typically in response to reduced auditory input. Its severity varies widely among individuals, and while often not life-threatening, it can be severely debilitating for some.
Hyperacusis
A condition where sounds that are normally tolerated become painfully loud or uncomfortable. It frequently accompanies hearing loss, as the dynamic range of hearing (the difference between the softest audible sound and the loudest tolerable sound) is reduced.
Superior Semicircular Canal Dehiscence
A condition where a part of the bone covering one of the balance canals in the inner ear is missing. This can lead to superhuman hearing of internal bodily sounds (e.g., eyeballs moving, footsteps) and vestibular symptoms like spinning in response to loud sounds or straining.
Auditory Plasticity
Refers to the brain's ability to adapt and reorganize its auditory pathways and processing in response to experience, such as musical training or the input provided by cochlear implants. This adaptability can be beneficial for improving function and coping with challenges.
14 Questions Answered
Hearing loss currently affects 1.5 billion people and disables half a billion of them, with the World Health Organization estimating another billion will be affected by 2050.
Sound waves travel down the ear canal, vibrate the eardrum, which sets tiny bones in motion, leading to fluid vibrations in the inner ear. These fluid movements deflect delicate hair cells, which then generate electrical signals transmitted to the brain via the auditory nerve.
The two main types are conductive hearing loss, affecting sound transmission to the inner ear, and sensorineural hearing loss, which originates from damage within the inner ear's sensory cells.
Roughly 80 decibels (dB) is safe for 8 hours. For every 3 dB increase in sound intensity, the safe exposure time should be halved (e.g., 83 dB for 4 hours, 86 dB for 2 hours, etc.).
Possibly. While temporary ringing may seem to resolve, it can indicate damage to the synapses connecting sensory cells to neurons, leading to 'hidden hearing loss' that might not be detected by standard audiometric tests.
Yes, there is mounting evidence for a strong link. Hearing loss can indirectly contribute to cognitive decline by leading to social isolation and depression, and direct links are an active area of research.
It is more effective to face the person, speak slowly, and eliminate background noise rather than simply speaking louder or yelling.
Magnesium supplementation has been shown to help for some people whose tinnitus is associated with migraines, but its general effectiveness for all types of tinnitus has not been established in large-scale studies.
The American Academy of Otolaryngology Head and Neck Surgery endorses amplification with hearing aids (for those who need it) and cognitive behavioral therapy. Cochlear implants can also reduce or eliminate tinnitus in people with severe hearing loss.
Yes, studies indicate that children and younger animals are more vulnerable to noise levels, meaning what an adult considers comfortable may be too loud and damaging for a child.
Yes, regular intake (at least twice a week) of non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen and acetaminophen can increase the likelihood of developing hearing loss, though this is often reversible if the medication is stopped.
Women tend to have better hearing pre-menopausally, but post-menopausally, their hearing sensitivity often declines to levels comparable to men. Environmental and occupational noise exposure also influences these averages.
Sound pollution, particularly in oceans from large ships and motorized vehicles, significantly damages the hearing and communication of sea animals like whales and dolphins, disrupting their navigation and social patterns.
In mammals, including humans, inner ear hair cells do not spontaneously regenerate. However, birds can regenerate their hair cells within days, and research is actively exploring how to reawaken these regenerative pathways in humans.
20 Actionable Insights
1. Protect Hearing for Brain Health
Protect your hearing not just for auditory function, but because there is mounting evidence for a strong link between hearing loss and dementia, and it protects your brain function more broadly.
2. Adhere to Safe Noise Levels
Limit exposure to loud sounds by following the rule that 80 decibels is safe for 8 hours, and for every 3-decibel increase, the safe exposure time should be halved (e.g., 83 dB for 4 hours, 86 dB for 2 hours).
3. Wear Earplugs in Loud Environments
Always wear earplugs at loud events like concerts, ensuring they provide adequate attenuation (e.g., 30 decibels for a 120-decibel concert) and are fitted correctly to protect against noise-induced hearing loss.
4. Take Magnesium Before Loud Noise
Consider taking magnesium, specifically magnesium threonate, before exposure to loud noise, as studies suggest it can protect against noise-induced hearing loss by supporting the cochlea’s ion balance.
5. Prioritize Healthy Diet for Hearing
Maintain a healthy diet rich in magnesium from sources like seeds, nuts, fish (especially salmon), and green leafy vegetables (like spinach), as good nutrition supports overall body health, including hearing.
6. Avoid Consecutive Noise Insults
If you experience ringing or a clogged sensation in your ears after noise exposure, be especially careful to avoid further high-threshold sounds, as two insults close in time can cause synergistic and irreversible damage.
7. Check Headphone Volume
Use the rule of thumb that if anyone standing near you can hear what you are listening to through your headphones, the volume is too loud and potentially damaging to your hearing.
8. Protect Children’s Hearing
Be extra cautious with noise levels for children, as their auditory systems are more vulnerable to damage than adults, meaning what’s comfortable for an adult may be too loud for a child.
9. Seek Professional Tinnitus Evaluation
If you experience tinnitus, seek a complete and thorough professional evaluation to rule out underlying conditions like tumors and to receive appropriate, evidence-based treatment, as self-supplementation has not been shown to be effective.
10. Manage Tinnitus with Distraction & CBT
If diagnosed with tinnitus, actively try to distract yourself from the phantom sound and consider cognitive behavioral therapy (CBT), as focusing on tinnitus can exacerbate the brain’s hyperactivity in auditory centers.
11. Communicate Effectively with Hearing-Impaired
When speaking to someone with hearing loss, face them directly, speak slowly, and minimize background noise, as this significantly improves their ability to understand speech compared to speaking louder or from another room.
12. Optimize Sleep Environment
Create an ideal sleeping environment that is quiet, dark, and cold, mirroring the conditions that bears use for hibernation, which are perfect for sleeping for months.
13. Use Earplugs for Better Sleep
Experiment with wearing earplugs while sleeping to block out ambient sounds, which can significantly improve sleep quality by reducing auditory input during rest.
14. Limit Regular NSAID Use
Avoid regular intake (at least twice a week) of non-steroidal anti-inflammatory medications like ibuprofen and acetaminophen, as studies show this increases the likelihood of developing hearing loss.
15. Avoid Heating Food in Plastic
Do not heat food in plastic containers in the microwave or store hot food in plastic, as this can release micro and nanoplastics that have been shown to be preferentially taken up by sensory hair cells in the ear.
16. Enrich Auditory System
Actively engage in activities that enrich your auditory system, such as listening to and playing music or learning new languages, as auditory training can enhance brain plasticity and improve its response to challenges.
17. Use Hands to Project Voice
If you need to project your voice over a distance without an amplification device, cup your hands around your mouth to create a makeshift horn, which helps to amplify and direct your sound.
18. Cup Hand to Ear to Hear
To better hear distant or faint sounds, cup your hand behind your ear to create a larger, temporary funnel that helps capture more sound waves.
19. Measure Ambient Sound Levels
Download a free decibel (dB) app on your phone to quantitatively measure sound intensities in your environment, helping you make informed decisions about safe exposure times.
20. Musicians’ Example for Earplugs
Observe that professional musicians, even in loud genres like rock and roll, consistently wear earplugs to protect their hearing, demonstrating that ear protection is a wise practice, not ’nerdy'.
6 Key Quotes
Hearing loss is a huge problem. It currently affects one and a half billion people and disables half a billion of them. And the World Health Organization estimates that another billion will be affected by 2050.
Dr. Konstantina Stankovic
Deafness is a worse misfortune because it separates you from people as opposed to things.
Helen Keller (quoted by Dr. Konstantina Stankovic)
If you have a trained violinist, if they move their finger by only a micron, so that's a millionth of a meter, the ear can perceive that as a change in pitch.
Dr. Konstantina Stankovic
If anyone can hear what you are listening to who is standing by you, it's too loud.
Dr. Konstantina Stankovic
It's easier to fix sensory dysfunction than to fix brain function. But the brain will take care of it if it's given corrected input.
Dr. Konstantina Stankovic
There isn't a primary cancer of the inner ear. And that's really cool.
Dr. Konstantina Stankovic
5 Protocols
Protecting Hearing at Loud Events
Dr. Konstantina Stankovic- Wear earplugs that provide adequate attenuation (e.g., 30 decibels for very loud concerts) and ensure they fit correctly.
- Consider taking magnesium before going to a loud concert, as studies suggest it can protect against noise-induced hearing loss.
Communicating with Individuals with Hearing Loss
Dr. Konstantina Stankovic- Face the person directly.
- Speak slowly.
- Eliminate or reduce background noises.
Optimizing Sleep Environment
Dr. Konstantina Stankovic- Ensure the sleeping environment is quiet (e.g., use earplugs).
- Ensure the sleeping environment is dark.
- Ensure the sleeping environment is cold.
Avoiding Hearing Damage from Heated Plastics
Dr. Konstantina Stankovic- Do not put food-containing plastic containers into a microwave to heat food.
- Avoid cooking hot food and then immediately placing it into plastic containers for consumption.
Reducing Risk of Hearing Loss from NSAIDs
Dr. Konstantina Stankovic- Avoid developing a habit of taking non-steroidal anti-inflammatory medications (like ibuprofen or acetaminophen) on a regular basis (at least twice a week) if not medically necessary.