Bilateral Hearing Loss: What You Need to Know

Bilateral hearing loss means that a person has reduced hearing in both ears. It can develop slowly from aging or repeated noise exposure, or it may appear after an illness, injury, medication, or sudden loud event.

Losing hearing in both ears can affect communication, safety, work, and relationships. Some causes can be treated, while others create permanent damage. A complete hearing evaluation can identify the type and severity of the loss and help determine which treatment options may help.

What Is Bilateral Hearing Loss?

Bilateral hearing loss affects the right and left ears. The degree of loss may be similar in both ears, or one ear may be worse than the other.

The condition can range from mild to profound:

• Mild loss may make quiet speech or high-pitched sounds difficult to hear.
• Moderate loss may cause frequent problems following normal conversations.
• Severe loss may make speech difficult to understand without hearing devices.
• Profound loss may prevent a person from hearing most speech and environmental sounds.

Hearing loss may also affect only certain pitches. A person might hear deep voices but miss higher sounds such as alarms, birds, or children’s voices.

Bilateral hearing loss is different from unilateral hearing loss, which affects one ear. It is also different from asymmetrical hearing loss, where both ears are affected but one has significantly greater damage.

When bilateral hearing loss may be connected to workplace noise, explosions, machinery, or another job-related event, a Hearing Loss Injury Attorney can help determine whether the worker may have a claim for benefits or compensation.

What Are the Main Types of Bilateral Hearing Loss?

The type depends on which part of the hearing system is affected.

Bilateral Sensorineural Hearing Loss

Bilateral sensorineural hearing loss occurs when both inner ears or hearing nerves are damaged.

The inner ear contains tiny sensory cells that change sound vibrations into signals the brain can understand. Once these cells are badly damaged, they usually do not repair themselves.

Common causes include:

• Long-term exposure to loud noise
• Aging
• Genetic conditions
• Head injuries
• Certain illnesses
• Medications that damage hearing
• Sudden acoustic trauma

This is one of the most common forms of permanent hearing loss. Hearing aids, cochlear implants, and other devices may improve communication, but they do not restore damaged sensory cells.

Bilateral Conductive Hearing Loss

Conductive hearing loss occurs when sound cannot move properly through the outer or middle ear.

Possible causes include the following:

• Earwax blocking both ear canals
• Fluid behind the eardrums
• Chronic ear infections
• Eardrum damage
• Problems with the small middle-ear bones
• Abnormal bone growth
• Structural conditions present from birth

Some conductive conditions are temporary. Treatment may include earwax removal, medication, drainage procedures, or surgery.

Mixed Hearing Loss

Mixed hearing loss includes both conductive and sensorineural damage.

For example, someone may have permanent inner-ear damage from years of loud noise and also have fluid or an infection in the middle ear. Treatment may address the temporary conductive problem while hearing devices help with the permanent inner-ear damage.

What Are the Symptoms of Bilateral Hearing Loss?

Symptoms may develop gradually, making them easy to overlook.

Common warning signs include:

• Difficulty understanding conversations
• Trouble hearing in restaurants or crowded rooms
• Feeling that people are mumbling
• Asking others to repeat themselves
• Turning up the television or phone
• Missing doorbells, alarms, or vehicle sounds
• Difficulty hearing high-pitched voices
• Ringing or buzzing in both ears
• Feeling mentally tired after conversations
• Avoiding social settings
• Trouble understanding speech over a radio or headset

A person may hear sound but struggle to understand the words. This is common when inner-ear damage affects the clarity of speech.

Family members or coworkers may notice the problem first. They may see that the person responds incorrectly, speaks louder than before, or frequently misses instructions.

What Causes Hearing Loss in Both Ears?

Several conditions can affect both sides of the hearing system.

Age-Related Changes

Hearing may gradually decline as a person gets older. Age-related hearing loss commonly affects both ears and may make high-frequency sounds harder to hear.

Aging does not mean hearing problems should be ignored. Hearing devices and communication strategies may make a meaningful difference in daily life.

Repeated Noise Exposure

Repeated exposure to loud noise can damage the sensitive structures in both inner ears.

Common sources include:

• Construction tools
• Heavy machinery
• Aircraft engines
• Firearms
• Explosions
• Industrial equipment
• Maritime engines
• Military operations
• Loud music
• Power tools

Noise damage may develop over many years. Workers may first notice temporary ringing or muffled hearing after a shift. Over time, those symptoms may become permanent.

For qualifying civilian contractors and maritime workers, claims involving hearing loss covered under the Defense Base Act (DBA) and Longshore and Harbor Workers’ Compensation Act may arise when job-related noise exposure or traumatic events contribute to the condition.

Sudden Loud Events

A blast, gunshot, explosion, vehicle collision, or equipment failure can damage both ears at once.

A sudden event may cause the following:

• Immediate hearing loss
• Ringing
• Ear pain
• Eardrum rupture
• Dizziness
• Balance problems
• Pressure or fullness

Sudden hearing changes should be evaluated promptly.

Medications and Chemicals

Certain medications can damage the inner ear. These are sometimes called ototoxic medications.

Some workplace chemicals can also affect hearing or make the ears more vulnerable to noise. Possible risks may arise in manufacturing, painting, fuel handling, construction, and industrial work.

Do not stop taking prescribed medication without speaking with the treating physician. A medical provider can review risks and possible alternatives.

Infections and Medical Conditions

Conditions that may affect hearing in both ears include:

• Meningitis
• Viral infections
• Autoimmune disorders
• Diabetes
• Circulation problems
• Chronic ear infections
• Neurological conditions
• Genetic disorders

A doctor may order additional testing when hearing loss develops without a clear history of noise exposure or aging.

Head Trauma

A serious fall, workplace accident, vehicle crash, or blast injury can damage the inner ears, hearing nerves, skull, or parts of the brain that process sound.

Hearing loss after a head injury may occur with dizziness, headaches, memory problems, confusion, or balance changes. These symptoms require medical attention.

When head trauma happens during covered employment, the resulting hearing loss may also support a workers’ compensation claim or a Defense Base Act (DBA) claim for qualifying civilian contractors working overseas. Medical records, accident reports, and evidence connecting the injury to the job can be important when seeking benefits.

When Is Hearing Loss an Emergency?

Sudden hearing loss in one or both ears should be treated as urgent.

Seek prompt medical attention when hearing drops suddenly or over a few days, especially when symptoms include the following:

• Severe dizziness
• Loss of balance
• Facial weakness
• Facial numbness
• Intense headache
• Ear bleeding or drainage
• Head trauma
• Recent explosion
• Sudden ringing
• Neurological symptoms

People sometimes assume that sudden muffled hearing is caused by wax, allergies, or congestion. A medical examination is needed to determine whether the problem involves the middle ear, inner ear, or hearing nerve.

Early treatment may be important for certain causes of sudden sensorineural loss.

How Is Bilateral Hearing Loss Diagnosed?

The evaluation may involve an ear, nose, and throat physician and an audiologist.

The provider will usually ask about:

• When the symptoms began
• Whether the loss was gradual or sudden
• Past ear infections
• Noise exposure
• Job duties
• Head injuries
• Medications
• Family history
• Ringing or dizziness
• Previous hearing tests

Several tests may be used.

Physical Ear Examination

A provider looks inside the ears to check for wax, infection, fluid, eardrum damage, or another visible problem.

Pure-Tone Audiogram

An audiogram measures the quietest tones a person can hear at different pitches. Each ear is tested separately.

The results help identify the degree and pattern of bilateral hearing loss.

Speech Testing

Speech testing measures how well a person detects and understands spoken words.

This is important because two people with similar tone-test results may have very different levels of speech understanding.

Tympanometry

Tympanometry checks how the eardrum moves and whether pressure or fluid is affecting the middle ear.

Additional Testing

Depending on the findings, a provider may recommend:

• Otoacoustic emissions testing
• Auditory brainstem response testing
• Balance testing
• Blood tests
• MRI or CT imaging
• Neurological evaluation

Not everyone needs every test. The evaluation should be based on the person’s symptoms and medical history.

How Is Bilateral Hearing Loss Treated?

Treatment depends on the cause and whether the damage is temporary or permanent.

Treating a Medical Cause

Conductive problems may improve after treating:

• Earwax
• Infection
• Fluid buildup
• Eardrum damage
• Middle-ear bone problems

Medication or surgery may be appropriate in selected cases.

Hearing Aids

Hearing aids make sounds louder and may improve speech understanding. People with hearing loss in both ears commonly benefit from wearing two hearing aids.

Using devices in both ears may help with:

• Locating sounds
• Understanding speech
• Hearing in background noise
• Maintaining balanced sound
• Reducing listening effort

The devices should be selected and adjusted based on the person’s hearing test and communication needs.

Cochlear Implants

A cochlear implant may be considered when severe or profound sensorineural damage limits the benefit provided by hearing aids.

The device sends sound information directly to the hearing nerve. Qualification requires a detailed medical and audiology evaluation.

Assistive Listening Devices

Additional tools may include:

• Amplified phones
• Television listening systems
• Alerting devices
• Remote microphones
• Workplace communication equipment
• Captioning services

These tools can support communication at home and work.

Communication Strategies

Helpful changes may include:

• Facing the person speaking
• Reducing background noise
• Asking people to speak clearly
• Using written instructions
• Improving room lighting
• Choosing quieter seating
• Confirming important information

How Can Bilateral Hearing Loss Affect Work?

Hearing loss in both ears can create serious communication and safety concerns.

A worker may struggle to:

• Hear alarms or warnings
• Understand radio messages
• Follow verbal instructions
• Detect approaching equipment
• Locate a moving vehicle
• Communicate with a team
• Participate in meetings
• Use a telephone
• Work safely in noisy areas

These problems may affect construction workers, maritime employees, aircraft personnel, factory workers, law enforcement officers, firefighters, military contractors, and people working near engines or firearms.

Workers should report hearing difficulties and request a formal hearing evaluation. Early records can help document when the problem began and whether it has progressed.

Can Bilateral Hearing Loss Be Work-Related?

Yes. Bilateral hearing loss may be work-related when job duties expose both ears to hazardous noise, chemicals, blasts, or repeated acoustic trauma.

Evidence that may help connect the condition to employment includes:

• Baseline hearing tests
• Annual audiograms
• Medical records
• Noise surveys
• Job descriptions
• Worksite safety records
• Hearing-protection records
• Incident reports
• Coworker statements
• Employment history
• Records of explosions or equipment failures

An employer or insurance carrier may argue that age, hobbies, prior jobs, firearms, or medical conditions caused the loss. A detailed medical and employment history can help identify the likely sources of damage.

What Legal Claims May Apply?

The available legal system depends on the worker’s job, location, and employer.

Florida Workers’ Compensation

A Florida employee may have a workers’ compensation claim when workplace noise or an accident causes or contributes to hearing loss.

The claim may involve medical treatment, disability benefits, impairment benefits, or disputes about whether the condition is work-related.

Longshore and Harbor Workers’ Compensation Act

Certain maritime employees may be covered by the Longshore and Harbor Workers’ Compensation Act.

The law includes scheduled compensation for occupational hearing loss. Eligibility depends on the worker’s duties and connection to qualifying maritime employment.

Defense Base Act

The Defense Base Act may cover qualifying civilian contractors who suffer hearing damage while working overseas under certain U.S. government contracts.

Claims may arise from aircraft noise, engines, weapons, explosions, construction activity, and other hazardous conditions.

Personal Injury Claims

A separate personal injury claim may be available when someone other than the employer caused the hearing damage.

Examples may include defective equipment, a negligent driver, an unsafe property condition, or another company’s dangerous conduct.

Protect Your Hearing and Your Legal Rights

Bilateral hearing loss can affect work, relationships, safety, and quality of life. A medical evaluation can determine the type of hearing damage and whether treatment or hearing devices may help.

Tucker Law Group assists people with hearing loss claims involving Florida employment, maritime work, and qualifying overseas government contract work. The firm handles Florida workers’ compensation, Longshore Act, Defense Base Act, personal injury, and Social Security Disability matters.

If your hearing declined after years of workplace noise or following a job-related accident, contact Tucker Law Group. The firm can review your audiograms, medical history, employment records, and the legal benefits that may apply.

Frequently Asked Questions