Why Sudden One-Sided Hearing Loss Requires Immediate Attention

If you've woken up with hearing loss in one ear, treat it as a medical emergency. Go to an ENT or urgent care within 72 hours — don't wait to see if it improves on its own. The sooner you're evaluated and treated, the better your chances of recovery.

What is Single-Sided Deafness?

Single-sided deafness (SSD) occurs when you experience significant hearing loss in one ear while the other maintains normal or near-normal hearing. Your brain relies on input from both ears to locate sounds, filter background noise, and maintain balance. When one ear stops functioning properly, everyday situations become genuinely difficult.

Consider trying to follow a conversation in a restaurant when the person speaking is on your affected side — or identifying which direction a car horn is coming from. These scenarios show how SSD affects safety, communication, and quality of life in ways that aren't obvious until you experience them.

Common Causes That Demand Urgent Attention

Sudden sensorineural hearing loss is the most time-sensitive cause. Often triggered by viral infections, this condition requires steroid treatment from a physician within days — not weeks — for the best chance of recovery. February's peak cold and flu season makes this particularly relevant, as respiratory viruses can affect the inner ear.

Acoustic neuroma, a benign tumor on the hearing nerve, typically causes gradual hearing loss but can present suddenly. Proper diagnosis through imaging is necessary to determine appropriate monitoring or treatment.

Meniere's disease causes episodes of hearing loss, vertigo, and tinnitus. Each episode can result in permanent hearing damage, making early diagnosis and management important for preserving remaining hearing function.

Head trauma can damage the delicate structures of the inner ear or disrupt nerve pathways. Even seemingly minor injuries deserve evaluation if hearing loss follows.

Where to Go First

For sudden hearing loss, your first call should be to an ENT (otolaryngologist) or urgent care. Steroid treatment — the primary intervention for sudden sensorineural hearing loss — must be prescribed by a physician. Waiting even a few days can significantly reduce your chances of recovery, so don't delay seeking medical care to schedule an audiology appointment first.

Once you've been evaluated medically and the acute phase is addressed, an audiological evaluation is the next step. At Kleckner Audiology, we conduct comprehensive hearing assessments that go beyond basic hearing tests — including detailed medical history review, visual examination of your ear canals, and advanced audiometric testing to pinpoint where in the auditory system the hearing loss originates. We also work closely with physicians and ENTs when additional testing, such as an MRI, is needed to rule out structural causes.

Treatment Options for Single-Sided Deafness

Once the cause is identified and medical treatment has been addressed, rehabilitation options come into play. For many people with permanent SSD, CROS (Contralateral Routing of Signal) hearing aids provide the most effective solution.

The Phonak CROS Infinio, which we offer at our Allentown practice, picks up sound from your affected ear and wirelessly transmits it to a hearing aid worn on your better ear. The result is restored awareness of sounds coming from your deaf side — no hearing function in the affected ear is required.

For people who have hearing loss in both ears but more severe loss on one side, BiCROS systems combine CROS technology with amplification for the better ear, addressing hearing needs on both sides at once.

The success of CROS technology depends heavily on proper fitting and verification. We use Real Ear Measurement to confirm your CROS system is programmed precisely for your ear anatomy and hearing needs — a verification step that many practices skip. This process verifies that sounds transmitted from your deaf side are reaching your better ear at appropriate levels across all frequencies, making the difference between a device that works adequately and one that works well for your specific situation.

For people with profound hearing loss who don't benefit from CROS systems, bone conduction devices or cochlear implants designed for single-sided deafness may be worth exploring. We evaluate your individual situation to recommend the approach most likely to help you.

The Adaptation Process

Adjusting to CROS technology takes time. Your brain needs to learn how to process sounds being routed from one side to the other, and some people initially find the experience unusual or fatiguing. This is normal and typically improves over several weeks.

We schedule follow-up appointments throughout your first year to monitor progress and make adjustments — modifying program settings, fine-tuning volume levels, or adjusting how the system handles background noise as you encounter different listening environments.

Many people with SSD also experience tinnitus in the affected ear. CROS systems often reduce tinnitus perception by providing auditory input to that side. For cases where tinnitus remains bothersome, we offer additional management strategies including sound therapy and counseling.

Schedule Your Hearing Evaluation in Allentown

If you've already been seen by a physician for sudden hearing loss, the next step is a comprehensive audiological evaluation. Our audiologists, Peter Kleckner, Au.D., and Katherine Stabler, Au.D., have extensive experience evaluating hearing loss and fitting CROS systems for people managing single-sided deafness.

For those who already have established SSD and are struggling with communication or safety concerns, we can assess whether CROS technology would benefit you. Call our Allentown office at 610-435-8299 to schedule your evaluation or book an appointment online.