Protect & Improve Your Hearing & Brain Health | Dr. Konstantina Stankovic

Dr. Stankovic emphasizes that while enjoying loud music or being in noisy environments can be appealing, it poses a significant risk to hearing. She explains that sound intensity is measured on a logarithmic decibel (dB) scale, meaning small increases in dB represent large increases in sound energy. For instance, 80 dB is safe for 8 hours, but 92 dB (a common concert level) is only safe for 30 minutes. To protect against this, she strongly recommends wearing earplugs. She advises checking the attenuation rating of earplugs, noting that some provide only 10-15 dB reduction, while others offer up to 30 dB, which would be necessary for very loud concerts. Proper fit is crucial for effectiveness. She also highlights that children's ears are more vulnerable to noise damage, making it important for parents to be extra cautious about sound levels for their kids.

Dr. Stankovic discusses the potential protective effects of magnesium against noise-induced hearing loss. She cites studies, particularly from countries with mandatory military service, where individuals given magnesium before noise exposure (like artillery fire) experienced less hearing loss. Research in animal models indicates that magnesium levels in the cochlea are significantly altered after noise trauma, more so than other ions. Large-scale human studies also suggest that individuals with higher serum magnesium levels or intake tend to have better hearing. While the precise dose and formulation are still being investigated, magnesium threonate is considered a promising option due to its ability to cross the blood-brain barrier, potentially offering protection at both the cochlear and central nervous system levels. She cautions that while magnesium is beneficial for overall health, supplementation should ideally complement a healthy diet, and the supplement industry lacks strict regulation.

Dr. Stankovic stresses that tinnitus is an 'umbrella term' encompassing many different conditions, making a precise diagnosis essential. She states that systematic reviews and meta-analyses have not shown definitive benefits for most supplements in treating tinnitus, though she acknowledges this might be due to lumping diverse subtypes together. The American Academy of Otolaryngology-Head and Neck Surgery endorses two main interventions: amplification with a hearing aid (for those with hearing loss) and cognitive behavioral therapy (CBT). She also supports the advice to actively distract oneself from tinnitus, as focusing on it can reinforce the neural circuits responsible for its perception. A thorough evaluation, including ear examination, hearing tests, and potentially imaging, is necessary to rule out rare but serious underlying causes like tumors. For severe cases, cochlear implants have shown significant success in reducing or eliminating tinnitus, suggesting that restoring peripheral auditory function can help the brain recalibrate.

Dr. Stankovic provides practical advice for effective communication with individuals experiencing hearing loss. She explains that people with hearing loss typically struggle most with understanding speech in noisy environments, even if they can hear well in quiet settings. Therefore, it's crucial to face the person directly, allowing them to utilize visual cues like lip-reading. Speaking slowly, rather than loudly, is also more effective, as yelling can distort speech and be uncomfortable. Eliminating background noises, such as a running faucet or a television, significantly improves their ability to comprehend what is being said. This approach helps compensate for the auditory system's reduced ability to filter out irrelevant sounds.

Andrew Huberman shares his recent experience of using wax earplugs for sleep, noting a significant improvement in his sleep quality. He explains that even during sleep, particularly REM sleep, the brain continues to process auditory information, and external noises can disrupt sleep architecture. By using earplugs, he creates a quieter environment, which he believes contributes to deeper and more refreshing sleep. He mentions an initial period where he could hear his own heartbeat, which was distracting, but this sensation eventually subsided as his brain adapted. Dr. Stankovic corroborates this by stating that the ideal sleeping environment, as observed in hibernating bears, is quiet, dark, and cold, emphasizing the importance of auditory quietude.

Dr. Stankovic explains that while hearing might return to normal on audiometric testing after a loud event, the underlying damage to the synapses between sensory cells and neurons can be permanent. This damage can take a long time to degenerate, leading to a condition known as 'hidden hearing loss.' This type of hearing loss is particularly prevalent among young people who might pass standard hearing tests but report difficulty understanding speech in noisy backgrounds or experience persistent tinnitus. The anatomical correlates of this damage are now being observed in both animal and clinical data, highlighting that the ear's delicate structures are more vulnerable than previously thought.

Dr. Stankovic highlights the current limitations of genetic testing for hearing loss, where only about half of patients receive a definitive diagnosis. The remaining cases often present with many 'variants of unknown significance' (VUSs), making it difficult to pinpoint the exact genetic cause. To overcome this, her team at Stanford is collaborating with Google to leverage AI. By applying AI tools, they aim to analyze these VUSs and determine their actual significance, thereby increasing the diagnostic success rate to 80%. This advancement is crucial for guiding more precise and effective therapies, as the current lack of specific diagnosis hinders targeted treatment approaches.

Dr. Stankovic underscores the deep connection between hearing and various aspects of human life, including emotional well-being, social relationships, and cognitive function. She notes that hearing loss is not just about difficulty perceiving sound; it can lead to significant social isolation, depression, and a decline in cognitive abilities. The economic burden of unaddressed hearing loss is staggering, estimated at nearly a trillion dollars annually, due to impacts on employment, quality of life, and the need for extensive support systems. This highlights that hearing health is a critical public health issue with far-reaching consequences for individuals and society.

Dr. Stankovic points out a fascinating biological observation: the inner ear, unlike many other organs, does not develop primary cancers. While the outer ear can be affected by cancer, the delicate structures deep within the skull remain largely immune. This unique characteristic suggests that the inner ear possesses inherent protective mechanisms or cellular properties that prevent cancerous growth. Understanding these mechanisms could provide invaluable insights for developing novel cancer therapies, by identifying what makes this specific organ resistant to uncontrolled cell division.