Hearing and Balance Disorders

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Audiology Services

Learn more about Audiology at UC San Diego Health.

Hearing and balance are closely connected functions of the inner ear. Our audiologists and otologists provide comprehensive diagnostic evaluation, specialized surgical and medical treatment, and assistive technology for hearing loss, ear diseases and balance-related disorders.

Hearing reconstruction surgery we perform includes:

As an academic health system, our physicians and researchers are dedicated to the highest level of patient care and energetic pursuit of improved therapies for these conditions.

Read more about our services at the tabs below.

Hearing Disorders

4 facts about hearing loss:

  1. It is one of the most common congenital disorders (abnormalities present at birth that develop in the womb and are caused by genetics, toxins or unknown reasons) in humans.
  2. Out of every 1,000 babies in the U.S., two to three are born deaf or hard-of-hearing.
  3. Hearing loss is one of the leading disabilities among older people.
  4. In the U.S., 18 percent of adults 45-64 years old, 30 percent of adults 65-74 years old, and 47 percent of adults 75 years old or older have a hearing impairment according to the National Institute on Deafness and Other Communication Disorders (NIDCD).

How Hearing Works

The sense of hearing is achieved through a combination of functions of the outer ear, middle ear and inner ear. Sound waves pass through the outer ear, are amplified in the middle ear, and travel to the inner ear.

The inner ear is a fluid-filled series of chambers. One of these chambers, the cochlea, is responsible for converting sound vibrations into nerve impulses. It is these nerve impulses that the human brain interprets as sound and what we call “hearing.” 

The inner ear also contains the semicircular canals which are responsible, in part, for sensing movement and maintaining balance.

Disorders of any of these structures can lead to hearing loss. Learn about how we test for hearing loss.

Types of Hearing Loss

Hearing loss can be conductive, sensorineural or both.

Conductive hearing loss: This occurs when there is a mechanical problem in the outer or middle ear and sound does not reach the inner ear (cochlea). Causes of conductive hearing loss include:

Sensorineural hearing loss: This type of hearing loss is caused by damage to the sensory nerve cells of the inner ear (cochlea), or to the auditory nerve. The sensory nerve cells in the cochlea convert the sound vibrations amplified by the middle ear bones into electrical impulses that are transmitted along the auditory nerve to your brain.

Repeated exposure to loud sounds, damaging chemicals and ototoxic drugs (medications that can damage hearing including aspirin and certain antibiotics) can cause damage to the sensory nerve cells in the cochlea. Presbycusis, which is age-related hearing loss, is sensorineural and the result of degeneration of the sensory nerve cells. Other causes of sensorineural hearing loss are infection, autoimmune disease or tumors.


Treatment depends on the cause and type of hearing loss.

Some hearing disorders can be treated medically or surgically. Hearing aids, cochlear implants and assistive hearing devices can also help if hearing is not treatable or restored to an acceptable level.

Assistive hearing devices are used in different settings depending on a person’s particular needs. Assistive hearing devices include:

  • Amplified telephones and answering machines
  • Wake-up alarms that vibrate
  • Loud door bells

Read more about these devices through audiology services.


Surgery can be an effective treatment solution for hearing loss caused by:

  • Tumors
  • Trauma
  • Perforation of the eardrum
  • Congenital malformations

We provide advanced microsurgery, minimally invasive surgery, and complex open surgeries to patients from throughout the region to address these conditions.

Comprehensive Cochlear Implant Program

A cochlear implant is an electronic device that bypasses damaged areas in the ear and stimulates the auditory nerve fibers in the cochlea, providing hearing to people with next to complete hearing loss.This is very different from hearing aids, which detect and amplify sound to the ear.

Cochlear implants can take some time to get used to. However, the benefits include being able to distinguish environmental sounds, have conversation (in person and on the phone), and identify warning sounds.

UC San Diego Health operates the largest cochlear implant program in the region. Our expertise in this area spans over 25 years of continuous expert care. Our team includes five cochlear implant surgeons for both adult and children.

Balance Disorders

The vestibular system in the inner ear is responsible for sense of balance.

Balance problems are often a result of:

  • Infection
  • Head injury
  • Circulation issues
  • Certain medications

They can cause you to feel:

  • Dizzy
  • Lightheaded
  • Disoriented
  • Like you are falling or floating

Our team regularly see patients for the following balance-related disorders:

Treating Balance Disorders

Treatment for balance disorders varies on the condition and the individual. Up to 80 percent of people obtain relief with vestibular exercise, a type of physical therapy that helps you regain balance.

Other treatments include:

  • Dietary changes
  • Medication
  • Surgery

Our experienced otolaryngology specialists work together to evaluate and treat your balance problems. We provide specialized care, and, depending on your diagnosis, may include physicians and therapists from other specialties.