What Is Audiology? A Complete Guide to Hearing Healthcare

What is audiology?

Audiology is the healthcare profession dedicated to the identification, diagnosis, and management of hearing loss, balance disorders, and related conditions of the auditory system. In plain terms, it’s focused on hearing and balance.

Audiology draws on a deep understanding of how hearing works, from the outer ear canal to the auditory cortex, to help you understand your hearing and find solutions that improve daily life.

What training is required to be an audiologist?

As a recognized healthcare profession, audiology requires advanced clinical training. In the United States, entry-level practice requires a Doctor of Audiology (Au.D.) degree — a four-year doctoral program that includes extensive supervised clinical experience. Audiologists must also hold state licensure and often pursue specialty certifications through bodies such as the American Academy of Audiology (AAA).

What do audiologists do?

The scope of what an audiologist does is considerably broader than many patients expect. While fitting hearing aids is one well-known part of the job, it represents only a fraction of what audiologists do.

Audiologists conduct comprehensive hearing evaluations designed to determine not just whether someone has hearing loss, but the type, degree, and configuration of that loss.

They also help patients navigate treatment options, which may include hearing aids, cochlear implants, assistive listening devices, or auditory rehabilitation programs.

Ongoing care is usually needed for helping manage tinnitus, treat balance disorders, conduct pediatric hearing screenings, and provide long-term support and care.

In short, audiologists are the specialists who guide patients through every stage of hearing healthcare — from that first moment of concern through diagnosis, treatment selection, device fitting, and long-term follow-up care.

How hearing works — and why it matters

To appreciate what can go wrong with hearing, it helps to understand how the auditory system works. Hearing is a remarkably sophisticated process that unfolds in milliseconds.

1. Sound enters the ear. The outer ear collects sound and sends it to the eardrum.
2. The middle ear amplifies sound. Tiny bones help boost the signal.
3. The inner ear sends signals to the brain. The cochlea converts sound into signals the brain can understand.

Damage or disruption anywhere along this pathway — whether from aging, noise exposure, infection, genetics, or other factors — can result in hearing loss. Audiologists are trained to pinpoint exactly where that disruption is occurring, which is what makes a proper diagnostic evaluation so important.

Conditions audiologists diagnose and treat

Audiology encompasses a wide range of conditions, not all of which involve straightforward hearing loss. Among the most common are:

• Sensorineural hearing loss — damage to the hair cells of the inner ear or the auditory nerve, the most prevalent type of permanent hearing loss in adults
• Conductive hearing loss — problems with the outer or middle ear, often caused by earwax buildup, fluid, or structural problems
• Mixed hearing loss — a combination of sensorineural and conductive hearing loss
• Age-related hearing loss (presbycusis)— a gradual, progressive reduction in hearing sensitivity that typically begins in the higher frequencies
• Noise-induced hearing loss (NIHL) — cumulative hearing damage caused by prolonged or repeated exposure to loud sound
• Tinnitus — the perception of sound (ringing, buzzing, hissing) in the absence of an external acoustic source, affecting an estimated 10 percent of U.S. adults
• Balance disorders (vertigo, dizziness) — conditions affecting the inner ear’s balance system, including benign paroxysmal positional vertigo (BPPV), labyrinthitis, and Ménière’s disease
• Auditory processing disorder (APD) — a condition in which the ears function normally but the brain has difficulty interpreting the sounds it receives
• Vestibular schwannoma — a typically benign tumor that develops on the auditory-vestibular nerve and can affect hearing and balance

Audiologists also play an important role in the early identification of hearing loss in newborns and children, where timely detection is critical for speech and language development.

Audiologists vs. ENTs vs. Hearing Instrument Specialists

One of the most common sources of confusion in hearing healthcare is understanding who does what, and which type of professional is the right starting point for a given concern.

If you’re unsure where to start, an audiologist is often a good first step.

An otolaryngologist (ENT), is a medical doctor who specializes in surgical and medical management of conditions affecting the ears, nose, throat, and related structures of the head and neck. ENTs address the structural and medical causes of hearing problems: removing tumors, treating chronic ear infections, performing cochlear implant surgery, and managing conditions like Ménière’s disease at a medical level.

Audiologists and ENTs frequently work as a team, with the audiologist handling the diagnostic testing and rehabilitation piece, while the ENT manages any underlying medical or surgical needs.

A hearing instrument specialist (HIS) is a licensed professional trained specifically in the selection, fitting, and dispensing of hearing aids. They are not trained to diagnose the full range of hearing and balance disorders or manage complex auditory conditions.

If you are experiencing new hearing changes, tinnitus, dizziness, or concerns about your hearing, an audiologist is typically a good first step. Audiologists can evaluate your symptoms, determine whether the cause is something like earwax, fluid, or hearing loss, and refer you to an ENT when medical care is needed.

Sudden hearing loss

Sudden hearing loss is an exception. If you experience a rapid or sudden change in hearing, it should be evaluated within 36 hours. Most ENT clinics will work-in same-day appointments for patients with this complaint. Audiologists can help identify the issue quickly and coordinate same-day referral to an ENT for prompt evaluation and treatment.

What to expect at an audiology appointment

For many people, understanding what the visit involves can make it considerably less daunting.

Most initial evaluations begin with a discussion of your symptoms and  history. Your audiologist will ask about the nature of your hearing concerns, any relevant medical history, noise exposure history, medications you’re taking, and whether hearing loss runs in your family. This conversation provides important context that shapes the testing that follows.

Hearing tests

You’ll typically then move into a soundproof testing booth for a series of hearing tests. These are non-invasive and straightforward: you’ll listen through headphones and indicate when you hear tones at different pitches and volumes, and you may also be asked to repeat words or sentences to assess speech understanding.

The results are plotted on a graph called an audiogram — a visual map of your hearing that shows how your hearing thresholds compare to the normal range across frequencies.

Reviewing treatment options

Your audiologist will review the audiogram with you, explain what it means, and discuss next steps, which may range from a recommendation for hearing aids to a medical referral or further testing. A good audiologist will make sure you leave that appointment with a clear understanding of your hearing status and a path forward, not just a printout of test results.

When you should see a hearing specialist, according to an audiologist

The World Health Organization estimates that over 1.5 billion people worldwide live with some degree of hearing loss, and research consistently shows that the average person waits four years after first noticing hearing difficulties before seeking help.

Here’s what Dr. Jessica Hinson, Au.D., part of our medical review team, has to say:

I tell all patients, friends, and family members to consider scheduling an audiology evaluation if they experience any of the following signs of hearing loss:

• Frequently ask people to repeat themselves
• Have difficulty following conversations in noisy environments
• Find yourself turning up the TV volume higher than others prefer
• Experience ringing or buzzing in your ears
• Notice sudden hearing or balance changes
• Are concerned about a child’s hearing
• Work in high-noise environments
• Are over 50 and haven’t had a baseline test

Baseline hearing tests are valuable even for people who aren’t experiencing noticeable symptoms. Just as you’d track blood pressure or vision over time, having a documented hearing baseline makes it easier to detect meaningful changes in future assessments.

Technology and the future of audiology

Audiology has changed rapidly in recent years, especially with advances in hearing technology. Today’s hearing aids are small, powerful digital devices that can often:

• Process sound in real time
• Adjust automatically to different environments
• Stream audio from smartphones
• Play tinnitus sound therapy
• Use artificial intelligence (AI) to adapt to your listening needs

Modern hearing aids are more personalized, comfortable, and effective than ever before. Plus, in 2022, the FDA introduced over-the-counter (OTC) hearing aids, making self-fitted devices available directly to consumers without a prescription. While this increases access, audiologists remain the critical resource for proper diagnosis, prescription-grade devices, and the ongoing care that makes hearing aid use successful.

Beyond devices, teleaudiology — the delivery of audiology services remotely via video and digital platforms — is expanding access to care for patients in rural areas and those with mobility limitations.

Researchers are also exploring new treatments, including gene therapy and ways to restore inner ear cells. These approaches are still in early stages and are not yet widely available. But they highlight how quickly hearing care is evolving, and the potential for future treatments.

What this means for your hearing health

Audiology is an important part of healthcare that many people don’t think about… until hearing problems begin. Hearing plays a key role in how we communicate, stay connected, and engage with the world around us. Changes in hearing can affect everything from conversations to overall well-being.

When it begins to change, having access to expert care makes a measurable difference.

Whether you’re at the beginning of your hearing health journey or simply trying to make sense of a diagnosis you’ve already received, understanding what audiology is and what audiologists do is a meaningful first step. The right audiologist will not just test your hearing — they’ll help you understand what you’re hearing, what you’re missing, and what can be done about it.