Sensorineural vs conductive hearing loss audiogram

Author: Dr Sagar Rajkuwar, ENT Specialist, Nashik, Maharashtra, India

🌐 www.entspecialistinnashik.com

Table of Contents

1. What’s the Difference?
2. Manifestations and Symptoms
3. Hearing Tests: What They Are and How They Function
4. Causes for the Conditions
5. Treatment Routes
6. FAQ
7. Summary

Are you in a rush? To put it simply, this is a brief overview.

• When sound is not effectively transmitted to the inner ear, conductive hearing loss results
• Inner ear (cochlea) or auditory nerve damage leads to sensorineural hearing loss (SNHL).
• Hearing impairment that is conductive is usually caused by ear infections, blockages, or structural issues, especially in children, and feels muffled or obstructed.
• Speech clarity is affected by sensorineural hearing loss, which makes high frequencies more difficult to hear and frequently starts with trouble hearing in loud surroundings.

Sensorineural vs. Conductive Hearing Loss: What’s the Difference?

What Is Conductive Hearing Loss? The Basics

Conductive hearing loss happens when sound waves are unable to pass through the middle and outer ear and reach the inner ear effectively. Blockages such as earwax, fluid accumulation, or structural damage often cause this impairment, making it difficult to hear faint sounds and causing louder sounds to be muffled or distorted.

Despite the fact that it is more common in children, especially in the winter, conductive hearing loss affects people of all ages and is fairly common due to ear infections or blockages. Although conductive hearing loss is uncommon in adults, it can still happen as a result of diseases like otosclerosis. Contrary to sensorineural hearing loss, it typically has treatable causes, which makes quick intervention essential.

Those with conductive hearing loss frequently portray sounds as muffled, as if they are listening through a barrier or underwater. It may be more difficult to distinguish between lower and moderate frequencies, which may cause speech to be unclear, particularly in noisy situations. However, other causes, such as chronic ear illness or genetic diseases like otosclerosis, might result in permanent hearing loss if not treated, even though many cases are transient and treatable, such as those caused by earwax or infections. Surgery or hearing aids are two examples of treatments that can frequently bring about comfort.

Particularly if it interferes with communication and daily activities, conductive hearing loss might be seen as a disability in extreme circumstances. The extent of the influence differs depending on the length and seriousness of the hearing loss. It is necessary to quickly resolve the underlying issues to avoid further decline and maintain quality of life.

Sensorineural Hearing Loss: The Basics

Aging, chronic noise exposure, specific drugs, or underlying health issues frequently cause sensorineural hearing loss (SNHL), which is the result of damage to the cochlea or the auditory nerve. This kind of hearing impairment makes it difficult to hear speech in loud situations since it lowers the clarity of both soft and loud sounds. Lower frequencies may remain mostly unaffected, although high-frequency sounds like children’s voices or chirping birds are frequently more difficult to hear.

With age-related hearing loss, or presbycusis, being the leading cause among older persons, SNHL is the most prevalent form of permanent hearing loss, affecting approximately one in every six people. Additionally, it may appear in younger individuals as a result of genetics, abrupt hearing loss episodes, or extended exposure to loud noises. Even if it happens slowly over time, people with a history of hearing loss in their families have a higher chance of acquiring SNHL.

Damage to the inner ear hair cells or auditory nerve cannot be reversed, making sensorineural hearing loss permanent. Although certain situations, including rapid hearing loss, might show some improvement with prompt therapy, most people benefit from cochlear implants or hearing aids to enhance their hearing and quality of life. SNHL can worsen over time due to persistent noise exposure or untreated conditions, therefore timely intervention and routine monitoring are essential.

SNHL may have a major effect on daily life, from communication problems in social situations to difficulties participating in events like music or television. It might result in social isolation, annoyance, or even cognitive deterioration if it isn’t managed. Despite the possibility of a disability caused by hearing loss, hearing aids and other adjustments can help to alleviate its symptoms and improve general health.

Manifestations and Symptoms of Conductive and Sensorineural Hearing Loss

Symptoms of conductive hearing loss should be identified.

One common indication of conductive hearing loss in young children is the appearance that the kid is “not listening.” Children may also experience a decline in their behavior, speech, and language development as well as an increase in exhaustion due to hearing loss. In youngsters, it commonly happens after a cold or ear infection. However, it may happen without any obvious trigger.

Adults who suffer from conductive hearing loss may report that their ears are muffled or blocked, as though the volume has been decreased. Additionally, they may state that their speech sounds like an echo.

Identifying Sensorineural Hearing Loss Indicators

People appear to be babbling during the initial stages of sensorineural hearing loss. This is due to the fact that high frequencies are typically affected initially, making it more difficult to hear the start and conclusion of words, which may be misinterpreted as the impression that people are not enunciating their words. Having trouble hearing in noisy situations is frequently the first sign of this. Additional symptoms that appear as the hearing loss worsens include the individual asking for things to be repeated more often, the TV being louder, and overall communication being more difficult.

It’s crucial to remember that symptomology alone might make it difficult to distinguish between conductive and sensorineural hearing loss. The most effective approach to determine the nature and degree of hearing loss is through a diagnostic hearing test.

Hearing Tests: What They Are and How They Function

A diagnostic hearing examination is the most effective approach to ascertain if you have hearing loss and if it is sensorineural or conductive. During this exam, your middle ear function, hearing health, and hearing will all be checked by your hearing care specialist. An audiogram, a visual representation of your hearing ability, is created during the audiometry component of this examination.

Sensorineural vs. conductive hearing loss audigrams

The lowest sound level you respond to through air and bone conduction is indicated on an audiogram. The hearing care expert will play noises in your ears through headphones during air conduction testing. As a result, if there is a loss of hearing anywhere along the hearing path, these sounds will indicate it since they must traverse the entire length of the path. With a special type of headset that rests on the bone behind your ear, they will also play noises to you. A bone conductor is what this is known as. Bypassing the middle and outside ear, the bone conductor tests the inner ear and nerve channel’s hearing. Your hearing professional can use a comparison of the air and bone conduction results to learn about the degree of your hearing loss and whether it is sensorineural or conductive.

Bone conduction thresholds are indicated on an audiogram with the signs > or ] for the left ear and < or [ for the right ear. X denotes the left ear and O represents the right ear when indicating air conduction thresholds.

How to Understand a Conductive Hearing Loss Audiogram

Since the inner ear is still functioning properly, the bone conduction findings will be normal if you have conductive hearing loss. However, due to conductive hearing loss brought on by an obstruction in the outer or middle ear, the air conduction data will be raised above the typical range.

Interpreting an Audiogram of Sensorineural Hearing Loss

At least some of the frequencies will have higher air and bone conduction thresholds if you have sensorineural hearing loss.

Causes for the Conditions: Conductive versus Sensorineural Hearing Loss

Is conductive hearing loss possible as a result of otitis media?

Specifically among young children, conductive hearing loss is frequently caused by otitis media. Even though it frequently clears up on its own, if it persists and causes major hearing loss, surgery may be necessary.

Is sensorineural hearing loss caused by acoustic neuroma?

By interfering with the transmission of auditory information along the nerve, acoustic neuroma causes sensorineural hearing loss. Hearing may be enhanced by alleviating any nerve impingement caused by the acoustic neuroma removal. However, due to damage from the acoustic neuroma or damage from removing it, people frequently experience some ongoing sensorineural hearing loss.

Is sensorineural hearing loss possible as a result of allergies?

Sensorineural hearing loss is not commonly caused by allergies. Nevertheless, they may result in conductive hearing loss if they cause inflammation or fluid buildup in the middle ear, which interferes with sound transmission. Although unusual, if serious inflammation or infections extend to the inner ear, the auditory nerve may occasionally be affected. Rather than allergies, damage to the inner ear brought on by things like aging, noise exposure, or hereditary disorders is a more common cause of sensorineural hearing loss.

Is sensorineural hearing loss possible as a result of head damage?

Sensorineural hearing loss (SNHL) can be brought on by head injuries. A strong blow to the head might damage the inner ear components, such as the cochlea, or interrupt the auditory nerve, which are necessary for sending sound signals to the brain. TBI can also impair blood flow to the inner ear, resulting in hearing loss. Hearing loss can be temporary or permanent depending on how severe the harm is. Head injury can sometimes result in both sensorineural and conductive hearing loss.

Is it possible for otitis media to lead to sensorineural hearing loss?

Fluid accumulation or pressure behind the eardrum generally leads to conductive hearing loss in cases of otitis media, which is an inflammation or infection of the middle ear. However, in uncommon and severe situations, chronic or untreated otitis media can result in sensorineural hearing loss. Permanent sensorineural hearing loss can result from the infection harming the cochlea or auditory nerve if it spreads from the middle ear to the inner ear. This is more likely to happen in cases of chronic or recurrent otitis media, especially if complications arise.

Is it possible for TMJ to lead to sensorineural hearing loss?

While temporomandibular joint (TMJ) problems can indirectly lead to hearing issues, they are not often the main cause of sensorineural hearing loss. Symptoms related to the ear, such as ear discomfort, tinnitus (ringing in the ears), or a feeling of fullness in the ear, may be brought on by TMJ disorders because of the closeness of the jaw joint to the ear canal. However, these symptoms are often not related to sensorineural hearing loss, which is caused by damage to the auditory nerve or inner ear. Hearing impairments related to the TMJ are usually transient and improve with treatment of the TMJ problem.

Is it possible for sensorineural hearing loss to lead to headaches?

Indeed, sensorineural hearing loss may occasionally cause migraines. Headaches can result from the strain of trying to hear and process noises, especially in tough listening situations, which can also cause tension, stress, and mental weariness. Also, if tinnitus (ringing in the ears) accompanies sensorineural hearing loss, the continuous noise may cause headaches as well as stress and discomfort.

Treatment Routes

Dealing with Conductive Hearing Loss

Hearing aids may be useful in treating conductive hearing loss that lasts for a long time. Bone-conduction hearing aids may be the greatest choice, depending on the reason for the conductive hearing loss. The most qualified person to advise you on whether hearing aids are appropriate for your circumstances is a hearing care expert.

Surgery for conductive hearing loss

Surgery may be an option to enhance hearing, depending on the cause of the conductive hearing loss. The placement of ventilation tubes (grommets) in otitis media may be necessary to ensure that the middle ear remains filled with air rather than fluid.

Surgery for otosclerosis can either use prostheses to replace the middle ear bones or remove the fixation of the middle ear bones.

The type of surgery will depend on what is causing the hearing loss. For your conductive hearing loss, the best person to consult about whether surgery is an option is an Ear, Nose, and Throat doctor.

Sensorineural Deafness Therapy

Sensorineural hearing loss is treated mostly with hearing aids. They are now considerably more successful at assisting people in hearing since listening device technology has advanced significantly in recent decades. Your hearing care professional can help you choose the best hearing aids for you.

Surgery for Sensorineural Hearing Loss

If your hearing loss gets to a point where hearing aids aren’t enough to help you hear, you could get a cochlear implant. An auditory nerve is stimulated by a cochlear implant in sensorineural hearing loss, skipping the damaged hair cells.

FAQ: What Is the Difference Between Sensorineural and Conductive Hearing Loss?

Is tinnitus a possible side effect of conductive hearing loss?

Tinnitus can be brought on by conductive hearing loss. Tinnitus, the awareness of ringing or buzzing in the ears, can happen if sound is not transmitted through the ear properly. Obstacles or issues in the outer or middle ear, such as earwax accumulation, fluid from infections, or eardrum damage, can change sound perception and result in tinnitus in the case of conductive hearing loss.

Is hearing loss caused by otosclerosis conductive or sensorineural?

Conductive hearing loss is mostly caused by otosclerosis. It happens when a stapes bone, which is essential for transmitting sound to the inner ear, is impacted by abnormal bone growth in the middle ear. This results in conductive hearing loss by interfering with the transmission of sound from the external ear to the internal ear.

In certain circumstances, if the otosclerosis develops and damages the cochlea (the inner ear), it may also result in sensorineural hearing loss, which is a mix of conductive and sensorineural hearing loss. Mixed hearing loss is what this is called.

Is age-related hearing loss conductive or sensorineural?

As the inner ear degenerates over time, age-related hearing loss (Presbycusis) develops. Hence, this is a sensorineural hearing loss.

Is sensorineural or conductive noise-induced hearing loss?

Sensorineural hearing loss is common in noise-induced cases. This is especially relevant to hearing loss caused by noise, which happens over an extended period. But if you are subjected to a sudden bang, such as blast noise, it might damage your eardrum or middle ear bones and result in conductive hearing loss.

Summary

Sensorineural vs. Conductive Hearing Loss Audiogram –

It’s crucial to know the difference between conductive and sensorineural hearing loss to ensure an accurate diagnosis and successful treatment. An audiogram, or hearing test, aids in determining whether hearing loss is due to damage to the auditory nerve or inner ear (sensorineural hearing loss) or issues with the outer or middle ear (conductive hearing loss). Sensorineural hearing loss is typically permanent and is usually managed with cochlear implants or hearing aids, whereas conductive hearing loss is frequently temporary and may be improved with medication or surgery.

This thorough guide explains the causes, symptoms, audiogram analysis, diagnosis, treatment choices, and frequently asked questions in order to help patients better comprehend their hearing problem and know when to get an assessment from an ENT specialist or audiologist.

Medical Disclaimer: This article is for educational and informational purposes only and should not be considered a substitute for professional medical advice, diagnosis, or treatment. If you experience sudden hearing loss, persistent ear pain, tinnitus, dizziness, or any hearing-related symptoms, consult a qualified ENT specialist or audiologist promptly. Early diagnosis and treatment can help prevent permanent hearing damage.