Understanding how hearing works and what causes it to change can help you take the right steps to protect it and stay connected to your world
Did you know? Nearly 1 in 5 people have hearing loss. It’s one of the most common chronic physical conditions, yet many people are unsure how or why it happens. Stigma surrounding hearing loss can make it harder to recognize and address changes in hearing, often leading people to delay seeking care or support.
At Hackensack Audiology & Hearing Aid Associates, we believe knowledge is power. As we celebrate Better Hearing and Speech Month this May, it’s a perfect time to break down how hearing works and what happens when it changes. Understanding more about one of your most critical senses can help you recognize signs of trouble and make informed decisions about your wellness.
How Hearing Works
Healthy hearing depends on the entire auditory system (the outer, middle, and inner ear, along with the brain) working together to detect, locate, and understand sound. The brain compares input from both ears to determine where sounds are coming from, while higher centers interpret meaning, such as speech, music, or warning signals.
Inside the cochlea, a fluid-filled, spiral-shaped structure in the inner ear, tiny hairlike structures called stereocilia sit atop sensory hair cells. As sound moves through the cochlea, these structures bend and:
- Help detect different pitches based on their location
- Convert movement into electrical signals
- Transmit those signals along the auditory nerve to the brain
If any part of this process is disrupted, by fluid buildup, structural changes, illness, or excessive noise exposure, hearing can be affected. This could lead to muffled or distorted sound; ringing in the ears or head (tinnitus); or difficulty understanding speech, especially in noisy environments.
What Happens With Hearing Loss
As mentioned above, hearing loss occurs when part of the auditory system is disrupted. But let’s take a closer look at what’s happening when it becomes harder to hear or understand the sounds around you. These changes often begin subtly, affecting clarity before volume, and can progress gradually over time.
In many cases, hearing loss involves damage to the delicate hair cells, which are responsible for converting sound vibrations into electrical signals. When they’re damaged, most commonly from aging or noise exposure, they don’t regenerate, which can reduce the brain’s access to important sound information.
As fewer or weaker signals reach the brain, sound may become distorted rather than simply quieter. This is why people with hearing loss often report that they can hear others speaking but have difficulty understanding what’s being said, especially in environments with background noise or competing conversations.
Over time, the brain must work harder to interpret incomplete or unclear sound signals. This increased listening effort can lead to fatigue and less ease in communicating. Early identification and intervention can help support clearer sound access and reduce the strain associated with untreated hearing loss.
Causes of Hearing Loss
As mentioned above, hearing loss can occur when one or more parts of the auditory system are affected. But what might trigger these changes in the first place?
Common causes of hearing loss include:
- Age-related changes in the inner ear (presbycusis)
- Noise exposure that damages sensory hair cells
- Genetic factors
- Ear infections or fluid buildup in the middle ear
- Medications that may damage the ear (ototoxicity)
- Trauma to the ear or head
- Circulatory or systemic health conditions that impact blood flow or nerve function
These causes can affect hearing in different ways, depending on which part of the auditory system is involved. Some may interfere with how sound travels through the ear, while others might impact how sound is converted into signals for the brain to interpret.
Hearing Loss Symptoms
Hearing loss often develops gradually, which is why it can go unnoticed at first. Many people adapt to subtle changes over time, making it harder to recognize that hearing has shifted.
Common signs include:
- Difficulty understanding speech, especially in background noise
- Frequently asking others to repeat themselves
- Turning up the volume on TVs or devices
- Feeling that others are mumbling
- Listening fatigue or increased effort during conversations
In many cases, the earliest symptoms are related to clarity rather than volume. Speech may sound less distinct, particularly in environments where multiple sounds compete for attention. This can make conversations in restaurants, group settings, or busy households more challenging.
Over time, increased listening effort can lead to fatigue or frustration, especially during longer conversations or social interactions. Some individuals may begin to withdraw from situations where communication feels difficult, even if they are not fully aware that hearing changes are the underlying cause.
Recognizing these symptoms early allows for timely evaluation and intervention, which can help support clearer communication and reduce the impact of hearing loss on daily life.
Hearing Tests and Hearing Loss Treatment
Modern hearing care isn’t one-size-fits-all. Treatment depends on the type, degree, and cause of hearing loss as well as your lifestyle and communication needs. For most hearing loss, hearing aids — discreet, often digital, and increasingly AI-enhanced for even greater support — are the most effective solution.
Today’s devices are designed to support speech understanding, reduce listening effort, and improve overall access to sound. In other cases, solutions may involve cochlear implants; aural rehabilitation; or treatment of an underlying issue, such as earwax buildup or ear infection.
The most effective treatment plans begin with a comprehensive hearing evaluation, followed by personalized recommendations and ongoing care.
At Hackensack Audiology & Hearing Aid Associates, care typically starts with a comprehensive hearing evaluation. This helps us craft a treatment plan that renews your ability to hear, allowing you to truly hear your best and live life on your terms. Here are some of the steps involved:
Step 1 — The Interview
The interview is a critical step in the process, personalized to your specific listening situations and goals. In this step we’ll determine the nature of your hearing concerns and uncover any specific areas requiring further attention. Some typical questions you’ll want to prepare for are:
- What listening situations do you want to hear better in?
- How are your hearing concerns impacting you and others in your life?
- How much background noise do you experience on a daily basis?
Step 2 — The Hearing Review
The hearing review is an important step in understanding how the auditory system helps you hear and how each part of the ear plays a critical role in the way you interpret sound from your environment.
We’ll conduct a hearing exam and a diagnostic test that will identify where and why there may be moments lacking clarity in hearing or understanding, referred to as “Sound Voids.”
In addition:
- A middle-ear evaluation measures how your middle ear reacts to varying degrees of air pressure.
- A speech assessment measures how well you hear and understand ordinary conversation at different volumes.
Step 3 — Treatment Solutions
Working closely with you, we’ll recommend treatment based on your hearing test results, hearing goals, and listening lifestyle.
Why Hearing in Both Ears Matters
Hearing with both ears, known as “binaural hearing,” is essential for how sound is naturally processed. The brain uses input from each ear to compare subtle differences in timing and intensity, helping you determine where sounds are coming from and focus on important signals in the environment.
When hearing loss affects one or both ears, the brain has to work harder to interpret sound. This increased listening effort can make conversations more challenging, particularly in noisy spaces or in environments with competing sounds.
Hearing loss doesn’t always affect both ears equally. In some cases, individuals experience unilateral hearing loss, where one ear hears better than the other. This imbalance can interfere with the brain’s ability to process spatial cues, affecting sound localization, speech understanding in noise, and overall listening balance.
Causes of hearing loss in one ear may include sudden sensorineural hearing loss, acoustic neuroma, infections, or structural differences. Because unilateral hearing loss can sometimes be associated with underlying medical conditions, it should always be evaluated promptly.
When appropriate, addressing hearing loss in both ears can help support more balanced sound perception and may reduce listening effort in everyday environments.
How Hearing Health Connects to Overall Well-Being
A growing body of research connects hearing loss to conditions even beyond communication challenges. While hearing loss may not directly cause these conditions — the research continues on potential causation — studies suggest significant associations with broader changes in physical, cognitive, mental, and social health.
For example, research published in The Lancet Commission on dementia prevention, intervention, and care identified hearing loss as one of the largest potentially modifiable risk factors for cognitive decline.
More recent research has also examined the relationship between hearing loss and physical safety. A 2025 systematic review found that hearing loss was associated with a significantly higher risk of falls, including a 51% greater likelihood compared to individuals without hearing loss.
Hearing loss has also been linked to social isolation and depression among some populations. Research has shown that some individuals with hearing loss are more likely to experience reduced social engagement and feelings of loneliness over time.
There is also evidence suggesting connections between hearing loss and health conditions such as cardiovascular disease and diabetes, both of which are also serious chronic medical issues.
These various findings reflect the importance of addressing hearing changes early. Supporting your hearing health is one part of maintaining overall well-being, and regular evaluations can help identify changes before they begin to affect other areas of your life.
Everyday Habits to Preserve Your Hearing
Most hearing loss can be effectively managed. The best approach, however, is prevention. Hearing loss isn’t simply inevitable with aging; reducing your risk is often easier than you may think. Common strategies involve practical everyday habits that can help protect your long-term hearing health.
Some prevention steps include:
- Limit exposure to loud noise and take breaks in noisy environments
- Use hearing protection when appropriate
- Keep volume levels at a safe range when using headphones or personal devices
- Schedule regular hearing evaluations, including a baseline test
- Address hearing concerns early rather than waiting for changes to progress
- Support overall health, including conditions that may affect circulation and nerve function
Taking a proactive approach to hearing health can help you preserve your hearing; catch and address potential changes before they grow bigger; support your overall health; and improve your quality of life.
Don’t miss the chance to take action during Better Hearing and Speech Month. At Hackensack Audiology & Hearing Aid Associates, we provide comprehensive evaluations, personalized recommendations, and ongoing care tailored to your hearing needs.
If hearing seems harder than it used to be or it’s been a while since your last checkup, don’t wait. Book your visit to better understand your hearing health and stay connected to conversations, experiences, and sounds that matter most every day.