Article-At-A-Glance
- Hearing loss can occur at any age and may develop gradually or suddenly.
- The major categories include conductive, sensorineural, and mixed hearing loss, although other auditory disorders can also affect how sound is perceived and understood.
- Hearing loss can affect communication, relationships, work, education, safety, and quality of life.
- Treatment depends on the cause and severity and may include medical care, hearing aids, assistive technology, rehabilitation, surgery, or cochlear implants.
- Sudden hearing loss, especially in one ear, requires prompt medical evaluation.
Hearing loss is common, but no two people’s experiences are exactly alike.
Some people are born with hearing loss. Others develop it because of aging, noise exposure, disease, injury, medications, genetic factors, or problems involving the outer, middle, or inner ear.
Hearing changes may develop so gradually that they are difficult to recognize. A person may initially notice difficulty understanding speech in restaurants, following conversations involving several people, hearing on the telephone, or distinguishing certain consonant sounds.
Understanding the type and possible cause of hearing loss is important because treatment and management options differ substantially.
What Is Hearing Loss?
Hearing loss occurs when part of the auditory system cannot detect or process sound normally.
The auditory system includes the outer ear, middle ear, inner ear, auditory nerve, and brain pathways involved in hearing.
A problem anywhere along this pathway can affect hearing.
Hearing loss may involve one or both ears and can range from mild difficulty detecting certain sounds to profound hearing loss.
Some forms are temporary or medically treatable. Others are permanent but can often be managed with hearing technology, communication strategies, rehabilitation, and other forms of support.
The Major Types of Hearing Loss
Conductive Hearing Loss
Conductive hearing loss occurs when sound is not efficiently transmitted through the outer or middle ear to the inner ear.
Possible causes include:
- Earwax blockage
- Middle-ear fluid
- Ear infections
- A perforated eardrum
- Problems involving the middle-ear bones
- Otosclerosis
- Congenital abnormalities of the outer or middle ear
Some conductive hearing losses are temporary or medically treatable. Others may require longer-term hearing management.
Sensorineural Hearing Loss
Sensorineural hearing loss results from problems involving the inner ear or auditory nerve.
Common contributors include aging, noise exposure, genetic factors, certain illnesses, and medications that can affect hearing.
Sensorineural hearing loss often affects both the audibility and clarity of sound. Making speech louder does not necessarily make every word perfectly clear.
Most permanent sensorineural hearing loss cannot currently be reversed by restoring damaged cochlear sensory cells. However, hearing aids, cochlear implants, assistive devices, rehabilitation, and communication strategies can provide substantial benefit for appropriately selected individuals.
Mixed Hearing Loss
Mixed hearing loss contains both conductive and sensorineural components.
For example, someone with permanent inner-ear hearing loss may also develop a middle-ear condition that further reduces hearing.
Management may therefore involve addressing the conductive problem while also treating or managing the underlying sensorineural hearing loss.
What Causes Hearing Loss?
Hearing loss has many possible causes. In some people, more than one factor contributes.
Age-Related Hearing Loss
Age-related hearing loss, also called presbycusis, usually develops gradually as people get older.
Changes can occur in the inner ear, auditory nerve, and other parts of the hearing system.
Age-related hearing loss commonly affects both ears and may make high-frequency speech sounds more difficult to hear.
Because the changes are often gradual, family members may notice communication difficulties before the person experiencing the hearing loss recognizes them.
Noise-Induced Hearing Loss
Noise-induced hearing loss can result from a single extremely intense sound or repeated exposure to hazardous noise over time.
Examples of potentially hazardous sources include:
- Firearms
- Explosions
- Power tools
- Industrial machinery
- Loud music
- Motorsports
- Some recreational activities
The risk from noise depends on both sound level and exposure duration. A single decibel value should not be treated as a universal boundary between safe and unsafe exposure.
Repeated hazardous noise exposure can permanently damage hearing, which makes prevention particularly important.
Learn more about protecting your hearing from excessive noise.
Genetic and Congenital Causes
Some hearing loss is caused by genetic factors and may be present at birth or develop later.
Hearing loss in infants can also be associated with prenatal infections, complications surrounding birth, and other medical factors.
Newborn hearing screening helps identify many children who need additional evaluation, but hearing loss can also develop after the newborn period.
Illness and Ear Disorders
Various medical conditions can affect hearing.
Examples include:
- Middle-ear infections
- Ménière’s disease
- Otosclerosis
- Autoimmune disorders affecting the ear
- Head injuries
- Some infections
- Neurological disorders
The presence of hearing loss does not identify its cause. Medical and audiological evaluation may be necessary to determine what is happening.
Medications and Ototoxicity
Certain medications can affect hearing or balance.
Examples include some medications used to treat serious infections or cancer and certain other drugs at particular doses or under particular circumstances.
Do not stop a prescribed medication because of concerns about hearing without consulting the clinician managing your treatment.
If a medication is known to have potential auditory effects, the treating healthcare team may recommend hearing monitoring when appropriate.
Common Signs of Hearing Loss
Possible signs include:
- Frequently asking people to repeat themselves
- Difficulty understanding speech in background noise
- Feeling that other people mumble
- Increasing television or device volume
- Difficulty understanding telephone conversations
- Missing doorbells, alarms, or other environmental sounds
- Difficulty hearing high-pitched speech sounds
- Withdrawing from conversations because listening is difficult
- Feeling unusually tired after sustained listening
- Tinnitus occurring with hearing difficulty
These symptoms do not prove that someone has hearing loss. A hearing evaluation can help determine whether hearing has changed and what type of problem may be present.
Signs of Hearing Difficulty in Children
Hearing is particularly important during early speech and language development.
Possible signs that deserve attention include:
- Delayed speech or language development
- Inconsistent responses to voices or sounds
- Difficulty following spoken instructions
- Frequently increasing television or device volume
- Academic or communication difficulties
- Concerns raised by parents, caregivers, teachers, or healthcare professionals
Children can develop hearing problems even after passing a newborn hearing screening.
Concerns about a child’s hearing should be discussed with an appropriate pediatric or hearing healthcare professional.
Sudden Hearing Loss Is Different
Gradually developing hearing loss and sudden hearing loss should not be treated the same way.
Sudden sensorineural hearing loss can occur all at once or over several days and commonly affects one ear.
Symptoms may include sudden reduced hearing, ear fullness, tinnitus, or dizziness.
Sudden unexplained hearing loss should be treated as a medical emergency and evaluated promptly.
Do not assume that a sudden change is simply caused by earwax, allergies, congestion, or aging.
How Hearing Loss Is Evaluated
A hearing evaluation may include several procedures depending on the person’s age, symptoms, medical history, and reason for testing.
Medical and Hearing History
The clinician may ask about:
- When the hearing difficulty began
- Whether one or both ears are affected
- Noise exposure
- Ear infections or ear surgery
- Tinnitus
- Dizziness or balance symptoms
- Family history
- Medications
- Communication difficulties
Otoscopy
An otoscope can be used to examine the ear canal and eardrum.
This may reveal earwax blockage, inflammation, structural abnormalities, or other findings that affect further testing.
Pure-Tone Audiometry
Pure-tone testing measures the quietest sounds a person can detect across different frequencies.
The results are recorded on an audiogram.
Learn more about hearing tests and how to understand an audiogram.
Speech Testing
Speech testing can provide information about how softly speech can be detected and how clearly words can be recognized under particular test conditions.
Speech results add information that cannot be obtained from pure-tone thresholds alone.
Middle-Ear Testing
Tympanometry and related tests can evaluate aspects of eardrum movement and middle-ear function.
These tests can help identify certain conductive problems.
Additional Testing
Depending on the findings, additional testing may include otoacoustic emissions, auditory brainstem response testing, imaging, balance testing, or other medical evaluation.
Who Provides Hearing Care?
Audiologists
Audiologists are healthcare professionals with graduate-level education and specialized training in hearing and balance assessment and management.
Many current audiologists hold the Doctor of Audiology (Au.D.) degree, while some practicing audiologists entered the profession under earlier graduate-degree pathways.
Audiologists can evaluate hearing, fit hearing aids, provide rehabilitation, and perform other services within their professional scope and state licensing requirements.
Hearing Instrument Specialists
Hearing instrument specialists are state-licensed professionals who perform hearing testing related to hearing-aid selection and fit and dispense hearing aids within their authorized scope.
Training and licensing requirements vary by state.
Otolaryngologists
Otolaryngologists, commonly called ENT physicians, are medical doctors who diagnose and treat diseases and disorders involving the ears, nose, throat, and related structures.
They may provide medical or surgical treatment for hearing problems when appropriate.
Hearing Loss and Everyday Life
Hearing loss can affect much more than the ability to detect sound.
Communication difficulties may influence relationships, work, education, independence, and participation in social activities.
Listening Effort and Fatigue
When speech is difficult to hear, people may devote greater attention and mental effort to following conversations.
This increased listening effort can contribute to fatigue, especially during long conversations or in noisy environments.
Social Connection
Difficulty communicating can make social activities frustrating or tiring.
Some people begin avoiding restaurants, meetings, family gatherings, or other situations where communication is difficult.
Hearing care, communication strategies, assistive technology, and support from family members can help reduce these barriers.
Emotional Well-Being
Research has found associations between hearing loss and outcomes such as social isolation, loneliness, depression, and reduced quality of life.
These relationships are complex. Hearing loss does not mean that someone will develop depression or another mental health condition.
However, persistent communication difficulties deserve attention because maintaining social participation is an important part of overall well-being.
Hearing Loss and Cognitive Health
Hearing loss has been associated in observational research with cognitive decline and dementia.
Researchers continue to investigate why this relationship exists.
Possible explanations include increased listening effort, changes in auditory input, shared health factors, and reduced social engagement.
It is important to distinguish association from certainty. Hearing loss does not mean that a person will develop dementia, and hearing aids should not be described as a guaranteed method of preventing dementia.
Hearing care can nevertheless improve communication and may help people remain engaged with family, friends, work, and everyday activities.
Learn more in Brain and Hearing Health: The Complete Guide.
Hearing Loss, Balance, and Falls
Hearing loss and balance disorders can occur together, particularly because structures responsible for hearing and balance are both located within the inner ear.
However, cochlear hearing loss itself should not automatically be described as causing poor balance.
Many different vestibular, neurological, visual, musculoskeletal, medication-related, and environmental factors can contribute to dizziness or falls.
New or significant balance symptoms deserve appropriate evaluation.
Learn more in Balance and Vestibular Disorders: The Complete Guide.
Tinnitus and Hearing Loss
Tinnitus is the perception of sound without a corresponding external sound source.
Many people with tinnitus also have hearing loss, but tinnitus can occur in people whose standard hearing tests do not show obvious hearing loss.
Hearing aids may help some people who have both tinnitus and hearing loss by improving access to environmental sound and communication.
Tinnitus that is new, one-sided, pulsatile, or associated with sudden hearing loss, neurological symptoms, or significant dizziness may warrant medical evaluation.
Learn more in Tinnitus: The Complete Guide.
Hearing Loss Treatment and Management
Treatment depends on the cause, type, severity, symptoms, communication needs, age, health, and personal preferences.
Options may include:
- Medical treatment for an underlying condition
- Hearing aids
- Cochlear implants
- Other implantable hearing devices
- Assistive listening technology
- Captioning and alerting systems
- Communication strategies
- Aural or auditory rehabilitation
No single approach is appropriate for every person with hearing loss.
Medical Treatment for Conductive Hearing Loss
Some causes of conductive hearing loss can be medically or surgically treated.
Examples include certain cases involving earwax, middle-ear fluid, infection, eardrum problems, or abnormalities of the middle-ear bones.
Treatment depends on the specific diagnosis.
Antibiotics, steroids, decongestants, or surgery should not be viewed as generic treatments for hearing loss. These interventions are appropriate only for particular conditions and should be determined by qualified healthcare professionals.
Hearing Aids
Hearing aids are electronic devices designed to improve access to sound for people with hearing loss.
Modern digital hearing aids can provide frequency-specific amplification and may include features such as:
- Directional microphones
- Noise management
- Rechargeable batteries
- Wireless connectivity
- Smartphone controls
- Telecoil compatibility
- Remote microphone integration
- Optional tinnitus sound features
Hearing aids do not restore normal biological hearing, and outcomes vary.
The appropriate device depends on the type and degree of hearing loss, communication needs, physical abilities, preferences, budget, and desired features.
Learn more in Hearing Aids: The Complete Guide.
Prescription and Over-the-Counter Hearing Aids
Adults in the United States have both prescription and over-the-counter hearing-aid options.
OTC hearing aids are intended for adults age 18 and older with perceived mild to moderate hearing loss.
Prescription hearing aids can address a broader range of hearing needs and generally involve professional fitting and follow-up.
OTC hearing aids should not automatically be considered inferior. They may be appropriate for some adults within their intended population.
People with more significant hearing loss, unusual symptoms, substantial differences between ears, sudden hearing changes, ear pain, drainage, or other concerning symptoms should seek professional evaluation.
Hearing-Aid Styles
Common styles include:
- Behind-the-ear (BTE)
- Receiver-in-canal or receiver-in-the-ear (RIC/RITE)
- In-the-ear (ITE)
- In-the-canal (ITC)
- Completely-in-canal (CIC)
Each style has potential advantages and limitations involving power, size, comfort, battery capacity, controls, maintenance, and available features.
No single style is best for everyone.
Learn more in Hearing Technology: The Complete Guide.
Cochlear Implants
Cochlear implants are electronic hearing devices that differ fundamentally from hearing aids.
Hearing aids amplify sound. Cochlear implants bypass damaged portions of the inner ear and use electrical stimulation to activate the auditory nerve.
A cochlear implant includes external and surgically implanted components.
Children and adults with significant hearing loss who receive limited benefit from appropriately fitted hearing aids may be evaluated for cochlear implantation.
Candidacy cannot be determined solely from a general description of hearing-loss severity. Evaluation considers hearing-test results, speech understanding, hearing-aid benefit, medical factors, communication needs, and other criteria.
Cochlear implants do not restore normal hearing. Learning or relearning how to interpret the signals from an implant requires time and rehabilitation, and outcomes vary among individuals.
Hearing Care for Children
Early access to effective communication is important for children with hearing loss.
Depending on the child and family’s needs and preferences, support may involve:
- Hearing aids
- Cochlear implants
- Assistive listening technology
- Speech and language services
- Sign language
- Educational accommodations
- Family-centered early intervention
Decisions should be individualized rather than based on a single age cutoff or a claim that one communication approach is best for every child.
Assistive Listening and Accessibility Technology
Hearing aids and cochlear implants are not the only technologies available.
Assistive devices can help in situations involving distance, background noise, telephone communication, television, alarms, and public spaces.
Examples include:
- Remote microphones
- Hearing loop systems
- Captioned telephones
- Real-time captioning
- Television streaming systems
- Visual or vibrating alerting devices
- Accessible smartphone features
Some assistive listening systems can be used with hearing aids or cochlear implants, while others can be used independently.
Communication Strategies
Technology works best when combined with good communication practices.
Helpful strategies may include:
- Face the person you are speaking with
- Reduce unnecessary background noise
- Use good lighting
- Get the listener’s attention before speaking
- Speak clearly at a natural pace
- Rephrase rather than simply repeating the same words
- Use captions or written information when useful
- Choose seating that improves access to the speaker
- Ask the person with hearing loss what communication method works best for them
Supporting Someone With Hearing Loss
One of the most helpful things family members, friends, caregivers, and coworkers can do is recognize that hearing difficulty is not the same as inattention.
Shouting is rarely the best solution.
Instead:
- Face the listener
- Speak clearly
- Keep your mouth visible when practical
- Reduce competing sound
- Rephrase misunderstood statements
- Avoid speaking from another room
- Include the person in group conversations
- Ask about individual communication preferences
These small adjustments can make conversations substantially easier.
Hearing Loss in the Workplace
Hearing loss can create communication and accessibility challenges at work, but many barriers can be reduced through appropriate accommodations and technology.
Depending on the job and individual needs, possible accommodations may include captioning, assistive listening systems, visual alerts, written communication, adjusted seating, or changes to communication procedures.
Workplace rights and accommodation requirements depend on applicable law and individual circumstances. Employees seeking accommodations may wish to consult their employer’s accommodation process or appropriate authoritative resources.
Protecting the Hearing You Have
Not every form of hearing loss can be prevented, but avoidable hazardous noise exposure can often be reduced.
Use Appropriate Hearing Protection
Earplugs and earmuffs can reduce noise exposure when selected and worn correctly.
The amount of real-world protection depends on the device and its fit. Do not assume that every foam earplug provides a fixed number of decibels of protection.
Reduce Listening Level and Duration
For headphones and personal audio devices, risk depends on both volume and listening time.
There is no universal “60/60 rule” that guarantees safe listening.
A better approach is to keep volume at a comfortable level, reduce listening time as sound becomes louder, use device-based safe-listening features when available, and avoid routinely overpowering environmental noise with higher volume.
Use Hearing Protection Around Intense Noise
Firearms, fireworks, power tools, concerts, machinery, and other intense sound sources may warrant hearing protection.
Some environments require specialized or dual hearing protection.
Give Your Ears a Break
Muffled hearing or tinnitus after loud sound exposure can indicate that the auditory system has been stressed.
Reducing additional exposure is sensible, but a temporary improvement after quiet time does not mean that repeated excessive exposure is harmless.
How Often Should Hearing Be Tested?
There is no universal rule requiring every adult to receive an annual audiogram beginning at age 45.
The appropriate testing interval depends on age, symptoms, occupational exposure, medical risk factors, previous hearing-test results, and professional recommendations.
A hearing evaluation is particularly reasonable when:
- You notice a change in hearing
- Family members notice communication difficulty
- You have persistent tinnitus
- You regularly experience hazardous occupational or recreational noise
- You take medications for which hearing monitoring has been recommended
- You have a medical condition associated with hearing problems
Sudden hearing loss should be evaluated promptly rather than waiting for a routine screening appointment.
Frequently Asked Questions
What Are the Most Common Causes of Hearing Loss?
Aging and noise exposure are important causes of acquired hearing loss, but hearing loss can also result from genetic factors, infections, ear disorders, injury, medications, congenital conditions, and other medical problems.
The cause cannot always be determined from symptoms alone.
Can Hearing Loss Be Reversed?
It depends on the cause.
Some conductive hearing loss caused by conditions such as earwax blockage or certain middle-ear problems may improve when the underlying condition is treated.
Most permanent sensorineural hearing loss cannot currently be reversed by restoring damaged cochlear sensory cells.
Sudden sensorineural hearing loss is different and requires prompt medical evaluation because timely treatment may improve the chance of recovery in some cases.
At What Age Does Hearing Loss Begin?
There is no single age.
Some people are born with hearing loss, some develop it during childhood or adulthood, and age-related hearing loss becomes increasingly common later in life.
Noise exposure and other risk factors can affect hearing at any age.
What Is the Difference Between a Hearing Aid and a Cochlear Implant?
A hearing aid amplifies sound so that the remaining auditory system can make better use of it.
A cochlear implant bypasses damaged portions of the inner ear and electrically stimulates the auditory nerve.
Cochlear implants require surgery and specialized evaluation and rehabilitation.
How Do I Know Whether I Need a Hearing Aid?
There is no single audiogram threshold that automatically determines whether every person needs a hearing aid.
The decision should consider the type and degree of hearing loss, speech understanding, everyday communication difficulties, personal goals, and preferences.
Adults with perceived mild to moderate hearing loss may also consider OTC hearing aids within their intended use.
Can Children Be Born With Hearing Loss?
Yes.
Hearing loss can be present at birth because of genetic factors, prenatal conditions, infections, or other causes.
Newborn hearing screening is designed to identify infants who need additional hearing evaluation, but some hearing loss develops later.
Does Hearing Loss Affect Mental Health?
Hearing loss has been associated with social isolation, loneliness, depression, anxiety, and reduced quality of life in research.
These are associations rather than inevitable outcomes.
Improving communication access and maintaining social participation can be important components of hearing care.
Does Hearing Loss Cause Dementia?
Hearing loss is associated with increased dementia risk in population research, but that does not mean hearing loss directly causes dementia in every individual.
The relationship is complex and continues to be studied.
Hearing aids should not be presented as a guaranteed way to prevent dementia, although treating hearing difficulty can improve communication and participation in daily life.
How Much Does Hearing-Loss Treatment Cost?
There is no reliable universal price for hearing-loss treatment.
Costs vary substantially according to the type of evaluation or treatment, device, professional services, geographic location, insurance coverage, warranties, follow-up care, and individual medical needs.
Before choosing hearing technology, ask what is included in the quoted price and check your current insurance or benefit coverage directly.
When Is Hearing Loss an Emergency?
Sudden unexplained hearing loss, particularly when it occurs in one ear over hours or a few days, should receive prompt medical attention.
Urgent evaluation is also appropriate when hearing changes occur with serious neurological symptoms, significant head injury, severe dizziness, or other potentially emergent symptoms.
Reliable Sources and Further Reading
- National Institute on Deafness and Other Communication Disorders — Adult Hearing Health Care
- NIDCD — Age-Related Hearing Loss
- NIDCD — Noise-Induced Hearing Loss
- NIDCD — Hearing Aids
- NIDCD — Cochlear Implants
- NIDCD — Sudden Sensorineural Hearing Loss
Apex Provides Education, Not Individual Medical Advice
Apex Brain & Hearing Health provides general educational information about hearing loss, hearing technology, communication, and related health topics.
This guide cannot diagnose the cause of hearing loss or determine which treatment or hearing device is appropriate for an individual.
Seek appropriate professional evaluation for persistent or concerning hearing problems. Sudden unexplained hearing loss should receive prompt medical attention.
