Mixed hearing loss is a combination of conductive (outer/middle ear) and sensorineural (inner ear/nerve) issues, resulting in both low volume and poor speech clarity. It occurs when problems affecting the inner ear, such as ageing or noise damage, coincide with outer/middle ear issues, such as fluid, infections, or injury.
To understand mixed hearing loss, it helps to know how hearing normally works. Sound travels down the ear canal, vibrates the eardrum, and is transmitted by the three small middle ear bones into the inner ear (the cochlea). The cochlea converts sound into electrical signals that travel along the auditory nerve to the brain. If the conductive pathway is disrupted and the cochlea is also impaired, you get mixed hearing loss.
In practical terms, some of the sound is not reaching the inner ear efficiently, and the inner ear or auditory nerve is not converting sound waves into clear signals as it should. This matters because improving the blockage alone may not fully restore clarity, and amplifying the sound alone may not be effective if the conductive loss persists.
Treatment typically combines medical and surgical intervention for the conductive component and hearing aids or implants for the sensorineural component. The sensorineural component is often long-term, while the conductive component is frequently reversible or improvable. Outcomes are usually best when the conductive component is addressed first, with the remaining sensorineural component supported by rehabilitation.
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.
Mixed hearing loss symptoms often include reduced volume and reduced clarity, especially in background noise and other noisy environments. Many first notice that speech sounds are muffled and that they miss consonants, even when others are speaking loudly. In Singapore, this is most evident in settings such as restaurants, hawker centres, and the MRT, where background noise makes it difficult to distinguish speech from other sounds. Common mixed hearing loss symptoms include:
Hearing fluctuates during colds and allergies, and ear discharge or ear pain in some cases
You should see an ENT specialist if hearing loss is persistent, unilateral, sudden, painful, associated with discharge, or affects your daily safety or communication.
Do not wait if you experience sudden hearing loss in one ear for hours or a couple of days, especially if you also have tinnitus or dizziness. Sudden inner-ear hearing loss can occur even with a concurrent conductive issue, and early treatment can make a difference for eligible patients.
It is also worth seeing an ENT specialist if you have recurrent ear infections or ongoing ear discharge, a known eardrum perforation, a history of ear surgery, or hearing that worsens during flights or after swimming. It’s also worth bringing your child to an ENT specialist if you have concerns about their hearing, speech, or attention in school.
For children, timing matters: ongoing hearing loss can affect speech, learning and attention, so it should be assessed early rather than left to progress indefinitely.
Common conductive contributors include:
Common sensorineural contributors include:
A mixed hearing loss diagnosis is made by combining your symptom pattern with ear examination and a hearing test that compares air conduction and bone conduction. The goal is to confirm that both components are present and then identify the specific causes. This is where the mixed-hearing-loss audiogram becomes central.
We will clarify the duration of symptoms, whether they fluctuate, whether one ear is worse than the other, and whether there is pain, discharge, tinnitus, dizziness, exposure to noise, use of certain medications, or a history of medical issues. In children, we assess ear infections, snoring, nasal obstruction, speech delay, and school performance.
The ear canal and eardrum are examined for cerumen, ear infection, perforation, fluid behind the eardrum, retraction pockets, or features that raise concern for chronic middle ear disease. Nasal and throat assessment is also important as allergy- and adenoid-related congestion can contribute to middle ear pressure problems.
A mixed hearing loss audiogram typically shows elevated air- and bone-conduction thresholds, with an air-bone gap indicating the added conductive hearing loss.
This pattern distinguishes mixed hearing loss from either purely conductive hearing loss or purely sensorineural hearing loss. Different types of hearing loss show different patterns on the audiogram.
Tympanometry helps assess eardrum mobility and middle ear pressure, which can point to fluid, negative pressure, or ossicular problems. Speech testing helps measure real-world understanding and guides hearing aid fitting and prognosis.
CT imagings are sometimes used when chronic middle ear disease, cholesteatoma, ossicular problems, or complex anatomy are suspected, or to plan surgical procedures. MRIs may be added in selected cases when the question involves the inner ear or nerve structures. Imaging is not routine for every patient, but it becomes important when it changes the course of care.
A mixed hearing loss treatment is most effective when the conductive component is addressed directly, and the sensorineural component is rehabilitated to improve clarity and function.
If the conductive hearing loss is reversible, addressing it can immediately improve hearing and also make hearing aids work more efficiently. This may involve wax removal, treating ear infections or inflammation, managing nasal allergies and Eustachian tube dysfunction, prescribing antibiotics when indicated, or inserting a grommet in selected cases.
Even after the conductive component improves, the inner-ear component often remains an issue. Hearing aids can be highly effective when carefully fitted and adjusted to real-world listening conditions.
When the conductive component cannot be adequately corrected, bone conduction devices can bypass the blocked outer or middle ear and deliver sound directly to the inner ear hair cells.
Cochlear implants may be considered when sensorineural hearing loss is severe, and speech understanding remains poor despite hearing aids.
A practical point about expectations. If the sensorineural component exceeds the conductive component, clarity may remain limited even when the sound is loud enough. The plan may then focus more on understanding speech and listening effort than volume alone.
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.
Recovery and risks depend on the surgical procedure. Surgical risks include bleeding, infection, dizziness, taste changes, or incomplete hearing improvement. Hearing improvement is often staged, with reassessment after each step to determine the degree of benefit.
At Barrie Tan ENT Head & Neck Surgery, care for mixed hearing loss begins with a precise diagnosis and culminates in a plan that fits your daily life. Treatment is matched to the patient’s anatomy, hearing goals and long-term needs.
If hearing feels blocked, unclear, or uneven between ears, it is worth getting a proper hearing profile. Mixed hearing loss is common and often very manageable once both conductive and sensorineural components are addressed. Contact Barrie Tan ENT Head & Neck Surgery at Gleneagles Hospital to arrange an assessment.
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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