Understanding hearing health
Your hearing changes.
You just don’t notice.
Unlike vision, hearing tends to fade slowly, evenly across both ears, and at the high frequencies first. The brain quietly fills in the gaps — so the change can go unnoticed for years. This is a calm, sourced look at what happens, why it matters, and what the research actually says.
The silent change
Slow, symmetric, and high-frequency first.
Age-related hearing change (presbycusis) is usually gradual and affects both ears together, starting with the high frequencies — the consonants that make speech crisp. Because the loss is even and slow, there’s rarely a single moment you notice. There’s just a world that gets a little quieter, and a brain that keeps adapting.
~1 in 3
adults over 65 are affected by age-related hearing loss
Source: WHO · NIDCD
~7–10 yrs
that people wait, on average, before seeking help (~8.9 years)
Source: Ear & Hearing, 2019
Why it matters
Hearing connects us to more than sound.
Hearing loss is one of the most widespread health conditions in the world — and research increasingly links hearing health to broader wellbeing. The associations below are exactly that: associations observed across populations, not claims that any product prevents, treats, or cures a condition.
~1.5B
people live with some hearing loss today
~2.5B
projected to live with hearing loss by 2050
~430M
need rehabilitation for hearing loss now
Source: WHO World Report on Hearing, 2021.
Largest
modifiable midlife risk factor for dementia
The Lancet Commission identifies hearing loss as the single largest modifiable midlife risk factor associated with later dementia — an estimated ~8% population-attributable fraction. This is an association, not a cause.
Lancet Commission on dementia prevention, 2020 / reaffirmed 2024
Isolation
associated with untreated hearing difficulty
When conversation becomes effortful, people withdraw. Untreated hearing difficulty is associated in observational public-health research with social isolation and higher rates of depression.
Observational public-health research — see Sources & notes
Falls
higher risk observed in studies
Hearing helps us stay oriented in space. Untreated hearing loss has been associated with higher fall risk in observational studies.
Observational public-health research — see Sources & notes
Researchers estimate that, across 14 modifiable factors combined, up to ~45% of dementia cases could theoretically be prevented — with hearing among the most impactful single factors in that model. These are population-level estimates about risk factors, not a promise about any individual or product. (Lancet Commission on dementia prevention, 2020 / 2024.)
The hopeful research
Addressing hearing may help — the evidence is encouraging.
The ACHIEVE trial (Lancet, 2023) studied whether hearing intervention could slow cognitive decline in older adults. In a prespecified, higher-risk subgroup, decline was slowed by roughly 48% over three years.
Important caveat: that result was not statistically significant in the full study cohort. It points to a promising direction for higher-risk groups — it is not proof that addressing hearing prevents cognitive decline for everyone.
Source: ACHIEVE trial, Lancet, 2023.
~48%
slower cognitive decline over 3 years in a prespecified higher-risk subgroup — not significant across the full cohort.
What you can do
Early awareness is the simplest step.
You don’t need a diagnosis to pay attention. Notice the moments speech gets effortful — busy restaurants, group calls, the TV creeping louder. Research links hearing health to cognitive wellness, and addressing hearing is among the most impactful modifiable factors in cognitive-aging research. Early awareness supports proactive health.
The OTC category exists for this.
In 2022, the U.S. FDA created the over-the-counter hearing-aid category for adults 18+ with perceived mild-to-moderate hearing loss — making it easier to act early, without a clinic visit or prescription.
Harmonix Elevate, if it’s a fit.
Elevate is our FDA-cleared over-the-counter hearing aid (FDA 510(k) K221052) for adults 18+ with perceived mild-to-moderate hearing loss — self-fit at home, with app control. A tool for those who choose to act, not a medical promise.
Start by understanding your hearing.
A few minutes of awareness today is the most proactive thing you can do. Explore the range to see what fits — or go straight to Elevate if you’re ready.
Interactive
How old is your hearing?
High-frequency hearing declines gradually with age — often before you notice. This quick tone test gives you a rough idea of where your hearing sits.
A two-minute tone test
We’ll play a series of tones — from low to high. Tap Yes, I hear it for each one you can hear. Your highest audible frequency maps to an estimated hearing age.
- Use headphones or earbuds — speaker quality affects results
- Find a quiet room
- Keep volume at a comfortable level
This is educational — not a clinical hearing test. If you have concerns about your hearing, see an audiologist.
Sources & notes
- WHO World Report on Hearing (2021) — global prevalence and 2050 projections.
- WHO & NIDCD — age-related (presbycusis) patterns and prevalence over 65. Audiogram curves are illustrative, not measurements.
- Ear & Hearing (2019) — average delay (~8.9 years) before seeking help.
- Lancet Commission on dementia prevention (2020, reaffirmed 2024) — hearing as the largest modifiable midlife risk factor (~8% PAF); up to ~45% across 14 combined factors. Association, not causation.
- ACHIEVE trial, Lancet (2023) — ~48% slower decline in a prespecified higher-risk subgroup; not significant in the full cohort.
- U.S. FDA — over-the-counter hearing-aid category created in 2022 for adults 18+ with perceived mild-to-moderate loss.
- Social isolation, depression and fall risk — qualitative associations with untreated hearing difficulty reported across observational public-health research. Associations, not causation; no effect size is asserted on this page.
This page is for general education and awareness. It is not medical advice and does not diagnose, treat, prevent, or cure any condition. SonaVue and TravelerAI are hearing enhancements, not hearing aids. Elevate is an FDA-cleared over-the-counter hearing aid for adults 18+ with perceived mild-to-moderate hearing loss.