age-related hearing loss

Hearing Better Through the Ages

By Rebecca Huzzy, Au.D.

Chances are, you visit your doctor for an annual physical, wear a seatbelt, and use sunscreen. These are just a few small efforts we regularly make to stay healthy and injury-free.

Tending to the health of our hearing is another important, simple way we can maintain our overall physical and emotional well-being. Supporting hearing health begins at birth, when we test newborns for hearing loss, and continues into our elder years, when assistive technology can vastly improve overall health and quality of life.

Diagnosing Newborns & Infants

According to the Centers for Disease Control and Prevention, hearing loss is one of the most common congenital conditions, impacting approximately 12,000 infants per year. About half of these cases are linked to certain genetic syndromes, such as Down syndrome, Treacher Collins, and Usher syndrome.

But with the advent of universal newborn hearing screening programs in the early 1990s, hearing loss can now be identified and treated very early. According to what we call the “1-3-6” EHDI (Early Hearing Detection and Intervention) national goals, infants should be screened by age 1 month; diagnosed by age 3 months; and in an early intervention program by age 6 months.

“The effects of providing acoustic stimulation to the immature neurological system, including the brain, and combining the input with a rich and meaningful environmental experience, allows children to develop sufficient auditory skills to learn spoken language at a very young age,” says Janice C. Gatty, Ed.D., the director of Child & Family Services at Clarke Schools for Hearing and Speech.

This means families should expose their infants to sound frequently and consistently—talking to them, naming objects, narrating actions, singing, and reading books. With access to sound and an early intervention program at this young age, a child with hearing loss can begin learning to listen, babble, and eventually talk.

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Common Risks for Adolescents & Teens

Since the prevailing cause of hearing loss in young people with typical hearing is noise exposure, we need to educate kids early, as many begin listening to music on personal devices, playing in bands, and attending concerts at a young age.

According to the American Speech-Language-Hearing Association, exposure to sound that is higher than 85 decibels (the volume of a blender, hair dryer, or siren) for an extended period of time can cause permanent hearing damage. And the maximum output of most MP3 players is a powerful 110 decibels!

Fortunately, there are options for volume-limiting software that can mitigate unhealthy sound levels. Many devices offer parental controls and volume-controlling apps that limit noise levels, and there are various kid-friendly, hearing-healthy headphones available.

Follow the 80/90 rule: Set the maximum headphone volume to be 80 percent (not 100 percent), and listen for up to 90 minutes daily. If you listen for longer, lower the volume even more.

How Sound Exposure Catches Up With Us in Middle Age

“Adult onset hearing loss typically progresses slowly over the course of a number of years,” says audiologist John Mazzeo, Au.D., the audiology supervisor at Nemours/Alfred I. duPont Hospital for Children in Wilmington, Delaware.

Noise-induced hearing loss (NIHL) can have a sneaky, cumulative effect, similar to the impact of years of exposure to the sun. The people at the highest risk for NIHL work in noisy professions and include musicians, farmers, dentists, airport workers, and military service members. For those who spend time in loud environments, wearing hearing protection is the best way to guard against NIHL.

Ototoxic drugs (drugs harmful to hearing) and certain conditions, such as Ménière’s disease, can also contribute to progressive hearing loss over time. Regular screenings, prior to the recommended age of 50, are especially important if hearing loss runs in the family, or if you have symptoms associated with hearing loss, such as tinnitus, dizziness, or a perceived decrease in hearing.

Caring for Seniors as Hearing Abilities Change

Hearing loss becomes much more prevalent with age, affecting more than 30 percent of people over age 65, and 80 percent of adults over 80.

Hearing loss in seniors is linked to serious health conditions, including dementia. When communication is difficult, many people will avoid social situations, and research shows that social isolation is linked to cognitive decline, a key symptom of dementia. Additionally, difficulty hearing can impact the effectiveness of our other neural processes.

The risk of falls also becomes more likely with age, due to both decreased spatial awareness and increased cognitive load. A 2012 Johns Hopkins study found that older adults with mild hearing loss were nearly three times more likely to have a history of falling.

Staying Fit

If you’re diagnosed with a hearing loss, remember: Hearing loss is not only very common, it’s also very treatable! A licensed audiologist or hearing healthcare professional can discuss options with you, including hearing aids and assistive listening devices.

When it’s a loved one struggling to hear, or being stubborn about getting help, be patient. Gain their attention before talking, rephrase sentences instead of repeating them, and encourage trying out some kind of amplification.

Think of your hearing health as essential to your body’s complete performance. Our bodily systems are all interconnected; neglecting to protect our ears or refusing helpful interventions can have cascading health effects. When you take even small steps to protect your hearing health and that of loved ones, such as through regular hearing screenings and using earplugs in noisy environments, take heart in knowing you have bolstered your overall well-being.

Rebecca Huzzy, Au.D., CCC-A, is an educational audiologist at Clarke Schools for Hearing and Speech at its Philadelphia location and a clinical audiologist at Nemours/Alfred I. duPont Hospital for Children in Wilmington, Delaware. For more, see clarkeschools.org. This article also appeared in the Spring 2018 issue of Hearing Health magazine. For references, see hhf.org/spring2018-references.

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New Research Shows Hearing Aids Improve Brain Function and Memory in Older Adults

By University of Maryland Department of Hearing and Speech Sciences

One of the most prevalent health conditions among older adults, age-related hearing loss, can lead to cognitive decline, social isolation and depression. However, new research from the University of Maryland (UMD) Department of Hearing and Speech Sciences (HESP) shows that the use of hearing aids not only restores the capacity to hear, but can improve brain function and working memory.

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The UMD-led research team monitored a group of first-time hearing aid users with mild-to-moderate hearing loss over a period of six months. The researchers used a variety of behavioral and cognitive tests designed to assess participants’ hearing as well as their working memory, attention and processing speed. They also measured electrical activity produced in response to speech sounds in the auditory cortex and midbrain.

At the end of the six months, participants showed improved memory, improved neural speech processing, and greater ease of listening as a result of the hearing aid use. Findings from the study were published recently in Clinical Neurophysiology and Neuropsychologia.

“Our results suggest that the benefits of auditory rehabilitation through the use of hearing aids may extend beyond better hearing and could include improved working memory and auditory brain function,” says HESP Assistant Professor Samira Anderson, Ph.D., who led the research team. “In effect, hearing aids can actually help reverse several of the major problems with communication that are common as we get older.”

According to the National Institutes of Health, as many as 28.8 million Americans could benefit from wearing hearing aids, but less than a third of that population actually uses them. Several barriers prevent more widespread use of hearing aids—namely, their high cost and the fact that many people find it difficult to adjust to wearing them. A growing body of evidence has demonstrated a link between hearing loss and cognitive decline in older adults. Aging and hearing loss can also lead to changes in the brain’s ability to efficiently process speech, leading to decreased ability to understand what others are saying, especially in noisy backgrounds.

The UMD researchers say the results of their study provide hope that hearing aid use can at least partially restore deficits in cognitive function and auditory brain function in older adults.

“We hope our findings underscore the need to not only make hearing aids more accessible and affordable for older adults, but also to improve fitting procedures to ensure that people continue to wear them and benefit from them,” Anderson says.

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The research team is working on developing better procedures for fitting people with hearing aids for the first time. The study was funded by Hearing Health Foundation and the National Institutes of Health (NIDCD R21DC015843).

This is republished with permission from the University of Maryland’s press office. Samira Anderson, Au.D., Ph.D., is a 2014 Emerging Research Grants (ERG) researcher generously funded by the General Grand Chapter Royal Arch Masons International. We thank the Royal Arch Masons for their ongoing support of research in the area of central auditory processing disorder. These two new published papers and an earlier paper by Anderson all stemmed from Anderson’s ERG project.

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Read more about Anderson in Meet the Researcher and “A Closer Look,” in the Winter 2014 issue of Hearing Health.

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