Sensorineural Hearing Loss: Causes, Symptoms, and Treatment Options in Edmonton

Sensorineural hearing loss is the most common type of permanent hearing loss. It accounts for roughly 90 percent of all hearing loss cases, and it is the type most people are dealing with when they walk through our clinic doors in Edmonton.

The name sounds complicated, but the concept is straightforward. “Sensori” refers to the sensory hair cells in the inner ear. “Neural” refers to the auditory nerve that carries sound signals to the brain. When either of these is damaged, the result is sensorineural hearing loss.

What happens inside the ear

Your inner ear contains a spiral shaped structure called the cochlea. Inside it are roughly 15,000 tiny hair cells. These cells pick up sound vibrations and convert them into electrical signals that travel along the auditory nerve to the brain, where they are interpreted as speech, music, birdsong, or a car horn.

When these hair cells are damaged or destroyed, they do not grow back. That is the defining feature of sensorineural hearing loss: once the damage happens, it is permanent. The signals reaching your brain are weaker, less detailed, and missing frequencies that the damaged cells used to pick up.

In some cases, the problem is with the auditory nerve itself rather than the hair cells, though this is less common. Either way, the result is the same: sounds are not just quieter, they are less clear.

How it differs from conductive hearing loss

Not all hearing loss works the same way. There are three main types, and knowing the difference matters because the treatment path is different for each.

Conductive hearing loss happens when sound is physically blocked from reaching the inner ear. The cause is usually in the outer or middle ear: earwax buildup, fluid from an ear infection, a perforated eardrum, or a problem with the tiny bones in the middle ear. In many cases, conductive loss is temporary and treatable with medication or a minor procedure.

Sensorineural hearing loss is different. The outer and middle ear are working fine. The problem is deeper, in the inner ear or auditory nerve, and it cannot be reversed with surgery or medication in most cases. Hearing aids are the primary treatment.

Some people have both types at the same time, called mixed hearing loss. A complete hearing test can identify exactly which type is present and in which ear.

Common causes of sensorineural hearing loss

Several things can damage the hair cells or auditory nerve. Often it is a combination of factors rather than a single cause.

Aging (presbycusis). This is the most common cause. The hair cells naturally deteriorate over a lifetime, with the high frequency cells declining first. Most people begin losing some high frequency hearing in their 30s or 40s, though it usually does not become noticeable until the 50s or 60s. Nearly half of adults over 75 have significant hearing loss.

Noise exposure. Prolonged or repeated exposure to loud sounds destroys hair cells. In Edmonton, this is especially relevant for workers in oil and gas, construction, and manufacturing. A single extremely loud event, like an explosion or gunshot at close range, can also cause immediate permanent damage.

Genetics. Hereditary factors play a significant role. If your parents or siblings developed hearing loss, your risk is higher. Some genetic conditions cause hearing loss from birth, while others make the hair cells more vulnerable to damage over time.

Ototoxic medications. Certain drugs can damage the inner ear as a side effect. These include some aminoglycoside antibiotics, high dose aspirin, loop diuretics, and certain chemotherapy agents like cisplatin. If you are on any of these medications, monitoring your hearing is important.

Infections. Viral infections including measles, mumps, and meningitis can damage the inner ear. Even a severe case of the flu or COVID-19 has been linked to sudden sensorineural hearing loss in some cases.

Meniere’s disease. This inner ear condition causes episodes of vertigo, tinnitus, and fluctuating hearing loss that typically becomes permanent over time. It usually affects one ear.

Head trauma. A significant blow to the head or a skull fracture can damage the cochlea or auditory nerve directly.

What sensorineural hearing loss sounds like

People with sensorineural hearing loss do not usually experience total silence. Instead, the world sounds distorted in specific ways:

Difficulty hearing in noisy environments. Restaurants, family gatherings, and busy workplaces become exhausting. Background noise competes with speech, and the brain cannot separate them effectively because the damaged hair cells are not providing enough detail.

Speech sounds muffled or unclear. You can hear that someone is talking, but the words are not crisp. Consonant sounds like “s,” “f,” “th,” and “sh” are especially hard to catch because they sit in the high frequencies that are damaged first.

Trouble with high frequency sounds. Birds chirping, the microwave timer, a child’s voice, the turn signal in your car. These high pitched sounds often fade first.

Tinnitus. Ringing, buzzing, or hissing in one or both ears is common alongside sensorineural hearing loss. The brain is trying to compensate for missing input by generating its own signals.

Voices seem loud enough but not clear enough. Turning up the volume does not always help because the problem is not volume, it is clarity. Louder does not equal clearer when hair cells are damaged.

How we diagnose it

A proper diagnosis requires more than a quick sound check. At Medicine Place Hearing Care, our registered audiologists use a combination of tests during a comprehensive hearing assessment:

Pure tone audiometry. You listen to tones at different pitches and volumes through headphones. The results are plotted on an audiogram, a chart that shows exactly which frequencies you can hear and at what volume.

Bone conduction testing. A small device placed behind your ear sends sound vibrations directly through the skull to the inner ear, bypassing the outer and middle ear entirely. This is the key test for distinguishing sensorineural loss from conductive loss. If you hear poorly through both headphones and bone conduction, the problem is in the inner ear.

Speech in noise testing. This measures how well you understand words when background noise is present. It reflects real world listening situations and helps us understand the functional impact of your hearing loss.

Tympanometry. This checks the health and movement of your eardrum and middle ear to rule out conductive factors.

Together, these tests tell us the type, degree, and configuration of your hearing loss, which shapes the treatment plan.

Nerve hearing loss treatment options

Sensorineural hearing loss cannot be cured with medication or surgery in the vast majority of cases. But it can be treated effectively, and treatment makes a significant difference in quality of life.

Hearing aids. These are the primary treatment for sensorineural hearing loss, and modern hearing aids are remarkably sophisticated. They do not just make sounds louder. They are programmed to amplify the specific frequencies you are missing, reduce background noise, and enhance speech clarity. Your audiologist programs them based on your audiogram, so the amplification matches your exact loss pattern.

Today’s hearing aids also connect to smartphones, stream phone calls and music directly, and adjust automatically to different environments. They are a long way from the bulky, whistling devices of decades past.

Cochlear implants. For severe to profound sensorineural hearing loss where hearing aids no longer provide enough benefit, cochlear implants are an option. These surgically implanted devices bypass the damaged hair cells entirely and stimulate the auditory nerve directly. Candidacy is determined through specialized testing.

Assistive listening devices. For specific situations like watching TV, attending meetings, or hearing in large rooms, accessories like remote microphones and FM systems can work alongside hearing aids to improve the signal.

Communication strategies. Learning to position yourself in conversations, use visual cues, and manage listening environments can significantly reduce the fatigue that comes with hearing loss.

Prevention and protecting the hearing you have

You cannot undo sensorineural hearing loss, but you can prevent further damage.

Wear hearing protection. Custom earplugs and earmuffs should be standard equipment in any loud environment. This matters especially in Edmonton, where oil and gas work, construction, and outdoor recreation like snowmobiling and hunting are part of daily life. Even a single unprotected noise exposure can cause permanent damage.

Follow the 60/60 rule. When using earbuds or headphones, keep the volume at or below 60 percent and take a break every 60 minutes.

Monitor ototoxic medications. If you are prescribed a medication known to affect hearing, talk to your doctor about monitoring your hearing before, during, and after treatment. Catching changes early gives you more options.

Get your hearing tested regularly. Baseline hearing tests in your 40s or 50s allow us to track changes over time. Early detection means earlier intervention, which leads to better outcomes.

Cold weather and your hearing. Edmonton winters are hard on ears. Prolonged cold exposure can reduce blood flow to the inner ear, and the combination of cold air and wind can irritate the ear canal. Wearing a hat or headband that covers your ears in winter is a simple way to protect them.

Take the first step

If you suspect sensorineural hearing loss, the most useful thing you can do is find out for certain. A comprehensive hearing test takes about an hour, does not require a referral, and gives you a clear picture of where your hearing stands.

Our registered audiologists at Medicine Place Hearing Care serve patients across Edmonton and surrounding communities. Book a hearing test at either of our Edmonton locations and get the answers you need to move forward.