We live in an age of wearables. We have watches that track our hearts and glasses that show us the internet. But there’s one piece of wearable tech that people still hide under their hair.
For decades, hearing aids have been seen as a sign of “slowing down” and being old. But look inside a modern one today and you’ll find a ton of new and advanced features, like Bluetooth streaming, fall detection, and even artificial intelligence.
Today, we’re stripping away the stigma and looking at the science. We’re moving past the “beige plastic” of the past and into the high-tech future of how we hear.
Welcome back to Can You Hear Me?, a podcast about hearing loss, how it affects people, and the science working to understand and treat it.
In the last episode, we talked about cochlear implants, devices that bypass damaged parts of the ear entirely and directly stimulate the auditory nerve. Today, we’re stepping back to something far more common: hearing aids.
You’ve definitely seen them, and you may think that all they do is amplify sound. At a basic level, maybe, but hearing aids are not just volume knobs for your ears. Understanding how they actually work helps explain both their power and their limitations.
Let’s start with the basics.
Traditional hearing aids are wearable electronic devices designed to help people with mild to moderate sensorineural hearing loss, though they’re also used in some cases of severe loss.
Unlike cochlear implants, traditional hearing aids do not bypass the ear’s natural pathway. Instead, they work with the ear’s existing structures. They take in sound, process it, and deliver a modified version of that sound into the ear, making speech clearer and more accessible.
These hearing aids have three core components. First, a microphone that picks up sound from the environment. Second, a processor, essentially a tiny computer, that analyzes the sound in real time. And third, a receiver, or speaker, that sends the processed sound into the ear.
That processing step is where modern hearing aids shine. They don’t just make everything louder. They amplify certain frequencies more than others, depending on a person’s specific hearing loss.
This is where audiograms come in. An audiogram maps how well someone hears different frequencies, from low-pitched sounds to high-pitched ones.
Most people with age-related or noise-induced hearing loss struggle most with high-frequency sounds. Since consonants—like t, s, k, and p—are higher frequency than vowels—a, e, i, o, and u—many people with hearing loss can have trouble distinguishing between words like “cat” and “cap,” or “sat” and “fat.” That’s why someone might hear that you’re talking, but miss what you’re actually saying. Like certain letters were pulled out of your speech.
Hearing aids can be programmed to target those weak frequencies, while leaving others relatively unchanged.
So when people say, “I tried hearing aids and they didn’t work,” the issue often isn’t the concept; it’s the fit, the programming, or the expectations.
Modern hearing aids are far more advanced than many people realize. Today’s devices can automatically adjust to different environments, reduce background noise, focus on speech coming from in front of you, and connect to smartphones via Bluetooth, streaming phone calls and music directly. Some even use machine learning to adapt over time. In many ways, hearing aids are closer to wearable computers than medical accessories. And yet, despite all this technology, many people avoid them.
Why? A big reason is stigma. Hearing aids are often associated with aging, weakness, or decline. Some people worry about how they’ll look. Others worry about what wearing a hearing aid says about them. But here’s the reality: untreated hearing loss has real consequences. It’s linked to social isolation, cognitive strain, and even increased risk of dementia. Biologically, hearing loss results in decreased sensory signal to the brain, which can weaken its processing ability in regions associated with language, memory, and emotion. Avoiding hearing aids doesn’t preserve independence: it often limits it.
Another reason people struggle with hearing aids is adjustment. Hearing aids don’t restore normal hearing. They provide access to sound, but your brain still has to relearn how to use that information.
At first, things might sound too loud, too sharp, or too different. That’s normal. Just like with cochlear implants, the brain needs time to adapt. This is why follow-up appointments and fine-tuning are so important. Hearing aids work best when they’re treated not as a one-time fix, but as part of an ongoing process.
Now let’s talk about something newer: over-the-counter hearing aids. In October of 2022, hearing aids were sold for the first time to patients without a prescription. The goal? To increase access and lower costs. That’s a good thing, but it also comes with trade-offs. Over-the-counter hearing aids are designed for adults with mild to moderate hearing loss, but they lack the customization that professionally fitted devices offer.
For some people, they’re a great starting point. But for others, they may not provide enough benefit.
And much of this benefit determination is subjective. The same amount of hearing ability regained doesn’t necessarily carry the same importance to different people. One area where this can become an issue is in noisy, crowded environments, where hearing aids can often struggle.
The reason lies in how complex hearing really is. Separating speech from background noise is one of the hardest tasks the brain performs. When the ear is damaged, the brain receives a degraded signal, hindering this ability. Hearing aids can help, but they can’t fully replicate the precision of a healthy inner ear. This is all a reminder of how extraordinary natural hearing is.
So where does this leave us? Hearing aids are powerful tools. They’re discreet, intelligent, and increasingly customizable. But they’re not magic. They require adjustment, patience, and support, and most importantly, they require people to be willing to acknowledge hearing loss in the first place.
In the next episode, we’ll be hosting an important figure in hearing loss research as our first guest interview of the podcast. I’m pretty excited about it, so I’ll keep it a surprise for you guys
Till then, this is Rishi, and I’ll see you in the next episode of Can You Hear Me?