A hearing test can tell us how well you detect sound, but it cannot always explain why sounds seem muffled, pressure feels uncomfortable or ear infections keep returning. That is where tympanometry helps. If you are wondering what happens during tympanometry, the test is quick, non-invasive and designed to assess how your eardrum and middle ear are functioning.
For many patients, the word sounds more daunting than the procedure feels. Tympanometry does not involve needles, medication or anything entering deeply into the ear. A qualified audiologist places a small soft-tipped probe at the entrance of the ear canal, takes a measurement in seconds, and uses the result alongside your symptoms and hearing assessment to build a clearer clinical picture.
What happens during tympanometry?
Before the measurement, your audiologist will usually look inside your ears. This matters because earwax, inflammation, discharge or an obvious eardrum perforation can affect whether tympanometry is appropriate and how reliably the test can be interpreted. If wax is blocking the canal, it may need to be removed before testing can give a meaningful result.
Once the ear canal is clear, the audiologist gently places a probe with a soft disposable tip into the outer opening of your ear. The tip creates an airtight seal. It should not be painful, although some people notice a brief sensation of fullness, similar to the pressure change felt on an aeroplane.
The instrument then changes the air pressure in the ear canal while presenting a quiet tone. It measures how freely the eardrum moves at different pressures. The test normally takes only a few seconds for each ear. You do not need to respond, press a button or try to hear the sound, so it can be particularly useful for young children and for adults who are unable to complete some behavioural hearing tests.
You may hear a low hum and feel the pressure shift briefly. Try to sit still and avoid speaking, swallowing or moving your jaw while the measurement is taken, as these actions can break the seal or alter the reading. If the seal is lost, the audiologist simply repeats the test.
What tympanometry measures
Your eardrum is not meant to be completely rigid. It needs to move in response to sound, transferring vibration through the tiny middle-ear bones towards the inner ear. For it to move efficiently, the air pressure behind the eardrum should be broadly balanced with the pressure in the ear canal.
Tympanometry assesses this movement, sometimes called compliance or mobility, across a range of pressure levels. The result is displayed as a graph known as a tympanogram. It provides information about middle-ear function rather than measuring hearing ability itself.
A tympanometry result can help an audiologist investigate whether symptoms may relate to:
- fluid behind the eardrum, often called glue ear or otitis media with effusion
- negative middle-ear pressure linked with Eustachian tube dysfunction
- a very stiff or poorly moving eardrum and middle-ear system
- an unusually mobile eardrum
- a blocked ear canal, including one affected by significant wax
- a perforation or a ventilation tube, depending on the wider ear examination.
The graph is not a diagnosis on its own. A similar pattern can have more than one explanation, which is why specialist interpretation is essential. Your audiologist will consider the result with your otoscopy findings, hearing test, medical history and current symptoms.
Why might an audiologist recommend the test?
Tympanometry is commonly included when someone reports a blocked sensation, popping, crackling, ear pressure, fluctuating hearing or recurrent ear infections. It may also be used after a cold, sinus symptoms, a flight or a period of allergy-related congestion, when the Eustachian tube may not be ventilating the middle ear effectively.
For children, tympanometry can be particularly valuable. Middle-ear fluid can reduce the clarity of sound reaching the inner ear, even when a child does not complain of pain. Parents may notice that their child asks for repetition, turns the television up, seems inattentive, mishears instructions or has speech and language concerns. These signs do not automatically mean glue ear, but an expert paediatric hearing assessment can identify whether middle-ear function is contributing.
In adults, the test can help distinguish between a hearing concern that may be related to the middle ear and one that is more likely to involve the inner ear or auditory nerve. That distinction affects the next steps. For example, hearing loss caused by temporary fluid may be managed very differently from age-related sensorineural hearing loss.
Does tympanometry hurt or carry any risks?
For the vast majority of people, tympanometry is comfortable and safe. The pressure change is brief and mild. Some patients dislike the temporary closed-in feeling, particularly if they are sensitive to ear sensations, have anxiety around medical procedures or experience hyperacusis. Tell your audiologist before the test if this applies to you. They can explain each stage, work at a comfortable pace and stop if you need a break.
Tympanometry is usually avoided or adapted when there is active ear discharge, a recent ear operation, a known perforation or significant pain, unless a clinician considers the measurement appropriate. This is one reason a visual ear examination comes first. A premium ear clinic should not treat testing as a routine machine printout; the condition of the ear and your comfort must guide the assessment.
Understanding your tympanometry result
Your audiologist may describe the shape of the graph using terms such as Type A, Type B or Type C. These labels are useful shorthand, but they need context.
A Type A pattern is generally associated with typical eardrum movement and middle-ear pressure. It does not rule out every possible hearing issue, but it suggests the middle-ear system is functioning within an expected range.
A flat, or Type B, pattern can occur when fluid is restricting eardrum movement. It can also appear if the probe was blocked by wax or did not make an effective seal. The size of the ear canal volume shown by the equipment helps the audiologist distinguish between these possibilities. In an ear with a grommet or eardrum perforation, a flat pattern may have a different meaning again.
A Type C pattern often indicates negative pressure behind the eardrum. This can happen when the Eustachian tube is not equalising pressure efficiently, such as during or after a cold. It may settle naturally, but the appropriate advice depends on how long symptoms have lasted, whether pain or infection is present, and whether hearing is affected.
Reduced movement can also be associated with a stiff middle-ear system, while unusually high movement may suggest a very mobile eardrum. Neither result should be interpreted in isolation or used to self-diagnose from an online chart.
What happens after the test?
The useful part of tympanometry is the conversation that follows. Your audiologist should explain the result in clear terms and relate it to what you have been experiencing. If your ear pressure and tympanogram are normal, further hearing testing may point towards another cause for your symptoms. If middle-ear dysfunction is identified, the plan may involve monitoring, medical review, earwax removal, onward referral or a repeat test after an appropriate interval.
For children with suspected fluid, the decision is rarely based on one result alone. Hearing levels, speech and language development, frequency of infections, school impact and the duration of symptoms all matter. For adults, persistent one-sided symptoms, sudden hearing changes, severe pain, dizziness or discharge require prompt clinical assessment rather than waiting to see if pressure settles.
At Tragus-The Ear Specialists, tympanometry is used as part of a wider expert assessment, not as a stand-alone screening exercise. Combining careful ear examination with diagnostic hearing tests gives patients and families a more reliable route to the right advice.
If your ears feel blocked, your hearing has changed or your child is struggling to hear clearly, a short tympanometry test can provide useful answers. The best next step is an assessment with a qualified audiologist who can turn the graph into clear, clinically appropriate guidance for your hearing and everyday life.