Conductive Hearing Loss (CHL) results when sound waves can’t travel effectively through the outer or middle ear to reach the inner ear. This results in muffled hearing or reduced hearing. Soft sounds become very quiet, and even loud sounds can seem indistinct. Conductive hearing loss can be caused by anything from obstructions and trauma to structural issues in the external ear canal.
Dr Barrie Tan, a Senior Consultant ENT Specialist, commonly treats conductive hearing loss in people of all ages. If you’re experiencing conductive hearing loss symptoms such as feeling blocked, muffled hearing, or a sudden loss of hearing (acute hypoacusis), it’s worth getting it checked, as these often indicate a treatable cause.
Unlike many inner-ear problems, conductive hearing loss is often reversible once the underlying cause is identified and addressed. It can occur on its own or alongside sensorineural hearing loss, in which case it is called mixed hearing loss.
At Barrie Tan ENT Head & Neck Surgery, we focus on attaining a precise diagnosis and providing practical solutions. Our conductive hearing loss treatment options range from medical therapy and simple in-clinic procedures to day surgery.
There are three main types of hearing loss, including:
This occurs when the tiny hair cells within the inner ear’s structures (cochlea) or the nerve pathways that transmit sound to the brain are damaged. The condition is typically associated with age-related hearing loss (presbycusis).
This type of hearing loss occurs when a problem in the outer or middle ear hinders sound waves from reaching the inner ear. Potential causes may include ear wax buildup, outer ear blockages, infections, or eardrum perforations.
This is a combination of sensorineural and conductive hearing loss, indicating potential damage in both the inner ear and the middle or outer ear.
At Barrie Tan ENT Head & Neck Surgery, we have subspecialised expertise in the diagnosis and treatment of hearing loss.
Conductive hearing loss often improves with treatment and is frequently temporary. If the cause is something like earwax buildup, middle ear fluid, or a hole in the eardrum, it is usually fixable with medical or surgical help. If a hearing test shows an air-bone gap, meaning sound reaches the inner ear much better through bone conduction than through air conduction, it strongly suggests a conductive hearing issue. This is good news because it means fixing the mechanical problem will likely restore hearing in the affected ear.
Even for long-term conditions, such as otosclerosis, there are practical solutions, such as conductive hearing loss surgery or hearing aids. It’s really important to get a diagnosis and start treatment for conductive hearing loss quickly. This is key for everyone to prevent permanent hearing loss. For children, it’s vital to avoid delays in speech and language development.
Some patients offer a clear definition of conductive hearing loss, as it’s often a feeling like your ear being ‘blocked’ or ‘stuffy’, rather than a total lack of hearing clarity.
Conductive hearing loss can be temporary or fluctuating, primarily due to fluid, an ear infection, or congestion. The first things to disappear are softer sounds, like whispers or distant noises. This is particularly difficult in noisy places, like a busy hawker or shopping centre in Singapore, where it’s already a struggle to separate conversation from background noise. Here are the typical signs:
Conductive hearing loss generally isn’t an emergency, but it’s important not to ignore it. You might miss essential warnings or safety sounds, pull back from social situations, or struggle to keep up at work, especially in busy rooms or meetings.
In children, conductive hearing loss, often due to middle ear fluid, can actually slow speech and language development. In adults, chronic middle ear problems can cause lasting damage if left untreated.
If you speak to an ENT specialist, they might mention the term ‘cholesteatoma.’ This is an uncommon, abnormal bone growth in the middle ear that can erode the delicate middle ear structures over time. It’s one of the primary reasons we take persistent ear discharge or long-term hearing loss very seriously.
Earwax and Ear Canal Blockage
Blockages in the external ear canal can cause conductive hearing loss. Earwax is normal, but when it becomes compacted, it can cause sudden hearing loss and a blocked sensation.
Foreign Objects
Foreign bodies in the ear are common in children. Small toys or cotton swabs can also become lodged in the ear canal, causing a blockage.
Middle Ear Fluid
Otitis media with effusion means fluid behind the eardrum, often after a cold or with long-term nasal congestion. Fluid accumulation in the middle ear is the most common cause of conductive hearing loss in adults and children.
Ear Infections
Otitis externa, an infection of the external ear canal often caused by bacteria or fungi, can also result in conductive hearing loss. A middle ear infection with fluid behind the eardrum is another frequent trigger, widespread in humid climates like Singapore. Conductive hearing loss resulting from ear infections may be treated medically with topical antibiotics or anti-fungal medications.
Eustachian Tube Dysfunction
Eustachian tube dysfunction means the pressure-equalising tube between the nose and the middle ear is not functioning correctly, often due to allergies, rhinitis, or sinus issues. This can lead to pressure, popping, and fluid build-up.
Eardrum Perforation
A tear or hole in the eardrum (also known as the tympanic membrane) can reduce sound transmission and sometimes lead to recurrent discharge, particularly if water enters the ear. Tympanic membrane perforation is a common cause of conductive hearing loss and can result from physical trauma or complications of ear pain.
Middle Ear Bone Problems
Otosclerosis is one example in which abnormal bone growth reduces the movement of the stapes, affecting sound conduction. Surgery, such as total or partial stapedectomy or stapedotomy, may be indicated when the air-bone gap is over 20 dB in cases like otosclerosis.
Foreign Bodies
Other common causes include a foreign object lodged in the ear canal, a tear or hole in the eardrum, and middle ear bone problems such as otosclerosis, in which abnormal bone growth reduces sound transmission.
Structural Abnormalities
Structural abnormalities of the ear canal or middle ear, whether congenital or acquired, may contribute to partial or complete blockage. Surfer’s ear, or exostosis, is another condition where abnormal bone growth narrows the ear canal.
Noticing hearing loss in one ear, also called unilateral hearing loss, can be unsettling, especially if it comes on suddenly or without an apparent cause. This type of hearing loss affects your ability to localise sounds, follow conversations in noisy places, or notice essential sound cues in your environment. Unilateral hearing loss can result from the same reasons listed above.
If you experience hearing loss in one ear, it is essential to have it checked by a hearing care professional. Even if the cause is as simple as earwax or a minor infection, a thorough assessment can rule out more serious conditions and help restore your hearing as quickly as possible.
Early diagnosis is critical if you notice additional symptoms such as ear pain, discharge, or a feeling of ‘fullness’ in your ear, as these may indicate treatable problems in the ear canal or the middle ear.
Conductive hearing loss diagnosis starts with a careful history and a targeted ear and nose examination, beginning with a physical examination of the ear, including inspection of the eardrum.
When to See an ENT Specialist for Hearing Loss
Consult an ENT doctor for hearing loss that is sudden, persistent (over a week or two), severe, unilateral, or includes dizziness, pain, ringing (tinnitus), discharge, or ear pressure, as these symptoms require prompt medical diagnosis and treatment for serious underlying issues.
In the ear with conductive hearing loss, the test will usually show an ‘air-bone gap’. This means your hearing is much worse when the sound travels through the air-conduction pathway than when it bypasses the outer and middle ears and goes straight to the inner ear via the bones.
This gap is a strong indication that the inner ear is working reasonably well. It’s just that something is blocking or slowing the sound as it travels to the inner ear.
This finding is important because it often guides us to specific treatments that can fix the problem more directly. This might involve simple solutions like removing a blockage, treating an infection, placing a small tube to help ventilate the middle ear, or reconstructing the tiny bones that carry sound.
If non-surgical treatments aren’t enough, like when fluid keeps building up, infections keep coming back, or there’s a structural problem that needs fixing, procedures can offer a good solution. Here are some of the standard surgical options:
If your hearing is still affected, or if surgery isn’t the best choice for you, hearing aids can make a big difference. They are invaluable for people dealing with ongoing conductive hearing loss, mixed hearing loss, or those who simply prefer to avoid surgery.
Dr Tan will carefully determine whether surgery is the best option for you, whether the potential benefits outweigh the risks, and whether non-surgical alternatives are available.
These devices amplify sounds, making them clearer and easier to understand. Some patients also find extra benefit in assistive listening devices, which offer visual flashes or vibrations for everyday sounds like the doorbell or phone ring, a great option if your hearing tends to change or remains weak.
Using hearing aids or bone conduction devices when needed is essential. It helps ensure your brain continues to receive sound input, which can help prevent hearing loss over time.
Your recovery journey really depends on the treatment you receive. For simpler treatments, such as earwax removal or minor cautery procedures, we usually perform them in the clinic, so you’ll have minimal downtime.
If you need a day surgery, you can often go home that same day. We’ll make sure you have very clear instructions for your post-op care and schedule a review appointment.
If surgery is a necessary step, we always take the time to discuss everything with you, including:
Ultimately, we want you to feel fully informed, not rushed, and absolutely clear about your next steps.
While not every case of conductive hearing loss can be prevented, you can significantly lower your risk by adopting a few simple habits:
Be Gentle with Your Ears
Avoid the temptation to push cotton buds or other objects deep into your ear canal.
Don’t Ignore Ear Infections
If you get an ear infection, seek treatment early.
Keep Objects Out
Especially for children, avoid inserting foreign objects into the ear or preventing them from doing so.
Manage Congestion
If you frequently deal with a stuffy nose or sinus issues, managing them can help prevent fluid from repeatedly building up in the middle ear.
Protect Your Ears in Water
If you spend a lot of time in the water, talk to your doctor about appropriate ear protection, particularly if you have an eardrum perforation or a grommet.
Dr Barrie Tan brings over 20 years of dedicated experience to ear surgery and hearing care. This includes managing complex diagnoses and performing procedures, whether it’s a simple day surgery or more involved inpatient care when needed. We make sure you’re never left wondering what the next step is.
If you’ve noticed your hearing feels blocked, muffled, or comes and goes, don’t hope it gets better on its own. A proper ear, nose, and throat (ENT) assessment, along with specific hearing tests, is the best way to pinpoint the cause and find a treatment that works for your life in Singapore.
Ready to hear more clearly? Schedule your consultation with Conductive Hearing Loss Specialist Dr Barrie Tan at Gleneagles today.
MBBS, MRCS (Edinburgh), MMed (Otorhinolaryngology), FAMS
Dr Barrie Tan is an ENT specialist at Gleneagles Hospital, Singapore, with more than 20 years of clinical and surgical experience. He previously served as Head of ENT and Director of the Centre for Hearing and Ear Implants at Singapore General Hospital. The information provided is not intended as medical advice. More about our medical experts.
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