The study of hearing and balance is called audiology. It’s a healthcare field dedicated to evaluating, diagnosing, and managing disorders of both the auditory and vestibular systems. These two systems share the same anatomy in the inner ear, which is why they fall under a single discipline. Audiologists originally focused on hearing loss alone but now assess and treat hearing, tinnitus, auditory processing, and balance disorders across all 50 U.S. states.
Why Hearing and Balance Are Studied Together
Hearing and balance aren’t just grouped together for convenience. They originate from the same embryonic tissue, a structure called the otic placode that appears around the third week of development in the womb. This tissue eventually forms the entire inner ear, including both the hearing organ (the cochlea) and the balance organs. Both systems sit inside a shared bony structure in the skull called the labyrinth, and both send signals to the brain through the same nerve, cranial nerve VIII, also known as the vestibulocochlear nerve.
Inside the labyrinth, the cochlea converts sound vibrations into electrical signals the brain interprets as sound. Right next door, three semicircular canals detect rotational movement (like turning your head), while two smaller organs called the utricle and saccule detect gravity and straight-line acceleration (like riding in an elevator). All of these structures are filled with specialized fluid. Because they’re so physically close and share nerve pathways, a problem in one system frequently affects the other. Something as simple as earwax buildup or a perforated eardrum can cause not only hearing changes but dizziness and imbalance.
How Common Are Hearing and Balance Problems
These issues affect a surprisingly large share of the population. Hearing loss is estimated to affect up to 19.3% of people globally, though moderate to severe loss is closer to 5.2%. Dizziness of any kind affects 15% to 35% of the general population. When narrowed down to vertigo caused specifically by inner ear dysfunction, the number falls to 3% to 10%. Tinnitus, the perception of ringing or buzzing in the ears, has been reported in up to 42.7% of people in some studies. Together, these conditions represent one of the most common reasons people seek medical care.
Conditions That Affect Both Systems
Several disorders illustrate how tightly hearing and balance are linked:
- Ménière’s disease causes sudden episodes of vertigo alongside hearing loss, ear pressure, and ringing in the ear. Symptoms come and go but can worsen over time.
- Labyrinthitis is inflammation in the inner ear that disrupts both balance and hearing simultaneously, often following a viral infection.
- Acoustic neuroma is a noncancerous tumor on the nerve responsible for hearing and balance, gradually affecting both functions as it grows.
- BPPV (benign paroxysmal positional vertigo) causes short bursts of dizziness triggered by specific head movements, like rolling over in bed. It’s the most common vestibular disorder.
- Vestibular neuritis involves inflammation of the balance nerve specifically, causing intense dizziness without hearing loss.
How Hearing Is Tested
The standard hearing evaluation uses pure-tone audiometry, where you sit in a soundproof booth wearing headphones and respond to tones at different pitches and volumes. This maps out exactly what frequencies you can and cannot hear, and at what loudness level. Testing through headphones measures the air conduction pathway (sound traveling through the ear canal, eardrum, and middle ear bones), while a small vibrating device placed behind the ear tests bone conduction, bypassing the outer and middle ear entirely. Comparing these two results tells the audiologist whether hearing loss originates in the outer/middle ear, the inner ear, or both.
Speech recognition testing measures how well you understand words at comfortable listening levels. Together, these tests create a detailed profile of your hearing that guides treatment decisions.
How Balance Is Tested
Balance testing takes advantage of a reflex that links the inner ear to eye movement. When your vestibular system is stimulated, your eyes move in predictable patterns. Videonystagmography (VNG) is the most widely used balance test. You wear goggles with a built-in camera that records your eye movements through three stages: tracking moving lights without turning your head, having your head and body placed in different positions, and caloric testing, where warm and cool water or air is introduced into each ear canal separately.
The temperature change in caloric testing stimulates the inner ear on one side at a time. If your eyes don’t move in the expected pattern, it suggests damage to the vestibular system in that ear or the brain pathways connected to it. This ability to test each ear independently makes VNG especially useful for pinpointing which side is affected.
Balance Relies on Three Systems, Not One
Your sense of balance isn’t produced by the inner ear alone. The brain continuously integrates information from three sources: the vestibular system in your inner ear, your vision, and proprioception (sensors in your muscles, joints, and skin that tell your brain where your body is in space). The brain weighs these inputs and adjusts your posture in real time. If one system is impaired, the other two can partially compensate, which is exactly what rehabilitation programs exploit.
This is why balance problems sometimes worsen in the dark (removing visual input) or on uneven surfaces (disrupting proprioceptive input). When two of the three systems are compromised at once, the risk of falls increases significantly.
Treatment: Rehabilitation and Devices
For balance disorders, vestibular rehabilitation therapy (VRT) is the most effective non-surgical treatment available. It’s an exercise-based program designed to retrain the brain to compensate for inner ear damage. The exercises focus on three goals: stabilizing your gaze during head movement, improving postural steadiness, and reducing vertigo through repeated, controlled exposure to the movements that trigger it. Most people notice significant relief from positional vertigo within four to six weeks of consistent practice. VRT works for any stable vestibular problem regardless of age, cause, or how long symptoms have lasted.
For hearing loss, treatment depends on the type. Conductive hearing loss, caused by blockages or damage in the outer or middle ear, can often be resolved with medication or minor surgery. Sensorineural hearing loss, from inner ear or nerve damage, is typically managed with hearing aids programmed to your specific hearing profile. For severe cases where hearing aids aren’t enough, cochlear implants bypass the damaged inner ear and stimulate the hearing nerve directly. Researchers are also developing open-source platforms that allow more precise customization of both hearing aids and cochlear implants, and early-stage work is exploring auditory brainstem implants for people who can’t benefit from either conventional option.
Audiologists vs. ENT Doctors
Audiologists are licensed professionals with doctoral-level training who specialize in testing hearing and balance, fitting hearing aids, programming assistive devices, and providing rehabilitation. They don’t prescribe medication or perform surgery. ENT doctors (otolaryngologists) are physicians and surgeons who diagnose and treat diseases of the ear, nose, and throat using both medical and surgical approaches. Some ENTs complete additional fellowship training to become otologists or neurotologists, specialists in complex ear conditions.
In practice, the two work together. An audiologist typically performs the detailed hearing and balance evaluations, then refers to an ENT when results suggest a condition requiring medical or surgical intervention, like sudden hearing loss (a medical emergency), recurring ear infections, or candidacy for cochlear implants. If your primary concern is difficulty hearing in everyday life, an audiologist is usually the right starting point. If you have ear pain, drainage, sudden hearing changes, or severe vertigo, an ENT evaluation is more appropriate.