A doctor of audiology (Au.D.) is a healthcare professional who specializes in diagnosing, treating, and preventing hearing loss and balance disorders. The Au.D. is a doctoral-level clinical degree, meaning audiologists complete four years of graduate training beyond a bachelor’s degree before they can practice independently. They work with patients of all ages, from newborns to older adults, and their expertise extends well beyond hearing aids into areas like tinnitus, dizziness, auditory processing, and implantable hearing devices.
What Audiologists Actually Do
Audiologists are trained to evaluate and manage the full range of hearing and balance problems. On the hearing side, that includes age-related hearing loss (the most common reason people seek help), noise-induced damage, tinnitus (ringing or buzzing in the ears), and auditory processing disorders, where the ears work fine but the brain has trouble making sense of sound. They are the only professionals qualified to diagnose auditory processing disorder.
On the balance side, audiologists assess and treat vestibular disorders, the inner-ear conditions that cause dizziness, vertigo, and unsteadiness. They work closely with ear, nose, and throat (ENT) surgeons and neurologists to develop treatment plans, and they provide vestibular rehabilitation, a type of guided exercise therapy that helps retrain the brain’s balance system.
Prevention is also a core part of the role. Audiologists advise on hearing protection for people in noisy workplaces or musicians, screen newborns for hearing loss, and monitor hearing in patients taking medications that can damage the inner ear.
Diagnostic Testing
A large part of an audiologist’s day involves running and interpreting diagnostic tests. Pure tone audiometry measures the softest sounds you can hear across different pitches, producing the familiar audiogram chart. Word recognition testing checks how well you understand speech, especially against background noise. Tympanometry evaluates the middle ear, detecting problems like fluid buildup, a perforated eardrum, or damage to the tiny bones that transmit sound. Acoustic reflex testing goes a step further, assessing nerve pathways between the ear and the brainstem.
For balance complaints, audiologists use specialized equipment to track eye movements and inner-ear responses, helping pinpoint whether dizziness originates in the ear, the brain, or somewhere else. These diagnostic results guide what happens next: whether you need hearing devices, medical treatment, surgery, or a referral to another specialist.
Hearing Devices and Cochlear Implants
Audiologists select, fit, and program hearing aids based on your specific hearing profile. This goes beyond picking a device off a shelf. They calibrate amplification levels across different frequencies, adjust settings for various listening environments, and fine-tune the fit over follow-up visits as your brain adapts to amplified sound.
For people with more severe hearing loss who don’t benefit enough from hearing aids, cochlear implants may be an option. An ENT surgeon performs the implant surgery, but the audiologist plays a central role before and after. They help determine whether you’re a candidate, and once the device is placed, they’re the ones who turn it on for the first time and program it. That initial session involves setting volume levels customized to your situation. From there, audiologists provide ongoing auditory rehabilitation, working with patients over weeks and months to help the brain learn to interpret the electrical signals from the implant as meaningful sound.
Audiologists also manage bone-anchored hearing devices, assistive listening systems, and other specialized technology for people whose hearing loss doesn’t respond well to conventional aids.
Education and Credentials
Becoming an audiologist requires a bachelor’s degree followed by a four-year Doctor of Audiology (Au.D.) program. The Au.D. is considered the entry-level degree for clinical practice, meaning you cannot practice audiology without it. Programs combine coursework in anatomy, acoustics, neuroscience, and pharmacology with extensive supervised clinical rotations where students work directly with patients.
Since January 2020, anyone applying for the Certificate of Clinical Competence in Audiology (CCC-A) through the American Speech-Language-Hearing Association must hold an Au.D. from an accredited program. All 50 states require audiologists to be licensed, and the scope of that license covers hearing, tinnitus, auditory processing, and vestibular disorders. Some audiologists pursue additional certification through the American Board of Audiology or specialize in pediatrics, cochlear implants, or vestibular care.
Audiologist vs. ENT Doctor
An ENT (otolaryngologist) is a medical doctor and surgeon who treats diseases of the ear, nose, and throat. An audiologist is not a medical doctor and does not perform surgery or prescribe medication. Think of the audiologist as your primary partner for hearing health and rehabilitation, while the ENT handles the medical and surgical side.
In practice, you’d see an audiologist if your hearing has faded gradually over time. They can assess your hearing levels, identify the type and severity of loss, and fit you with appropriate technology. You’d see an ENT if your hearing loss came on suddenly, or if you have ear pain, drainage, or persistent dizziness that suggests an underlying medical condition. In many cases, both specialists work together as part of the same care team.
Audiologist vs. Hearing Instrument Specialist
A hearing instrument specialist (HIS) is licensed to fit and sell hearing aids, but their training is significantly narrower. They typically complete a certificate or associate-level program rather than a doctoral degree. They can perform basic hearing screenings and program hearing aids, but they do not diagnose hearing loss, tinnitus, auditory processing disorders, or balance conditions. If your only need is a straightforward hearing aid fitting, a HIS can help. But if you need a full diagnostic workup, have tinnitus or dizziness, need a cochlear implant evaluation, or have complex hearing needs, an audiologist is the appropriate provider.
Job Outlook and Salary
The median annual salary for audiologists was $92,120 as of May 2024, according to the Bureau of Labor Statistics. Employment is projected to grow 9 percent from 2024 to 2034, which is much faster than average for all occupations. That growth is driven largely by an aging population: age-related hearing loss is one of the most common chronic conditions in older adults, and demand for audiological services is expected to rise accordingly. Audiologists work in hospitals, private practices, ENT clinics, schools, veterans’ health systems, and hearing device manufacturers.