You hear less, but the sound still “comes in.” Like someone turned back the volume knob, without the radio being broken. That’s conductive hearing loss in a nutshell. It is a form of hearing loss that is common, relatively easy to explain and, in many cases, also (partially) treatable. Yet the term often causes confusion. Time to explain it clearly and calmly.
What exactly is conduction loss?
Conductive hearing loss means that sound cannot travel its way to the inner ear properly. So the problem is not in the sense of hearing itself, but in the transmission of sound. Everything that should normally conduct sound does not work as well.
This can happen in:
- the ear canal
- the eardrum
- the middle ear
- the ossicles (hammer, anvil and stirrup)
The inner ear and auditory nerve usually still function fine. Sound just arrives too weak or distorted.
How does hearing normally work?
To properly understand conductive hearing loss, it helps to know briefly how hearing normally occurs. Sound waves travel through the ear canal to the eardrum. This vibrates and sets the ossicles in motion. These amplify the sound and transmit it to the inner ear, where it is converted into nerve impulses to the brain.
With conductive loss, something goes wrong somewhere along that path. The sound gets there, but along the way it loses power.
What does conduction loss sound like?
People with conductive hearing loss often describe hearing as dull or muffled. Like having an ear constantly underwater or like there’s a plug in there that just won’t come out.
Typical experiences include:
- voices sound softer but understandable
- low notes are often more audible than high
- one’s own voice sounds louder in the head
- ambient sounds feel “far away”
The difference with other forms of hearing loss is that the sound quality is often still fairly intact, only the volume is missing.
What are common causes?
Conductivity loss can have several causes. Some are temporary, others permanent. Common causes are:
- earwax plugging the ear canal
- fluid behind the eardrum
- middle ear infection
- a hole or scar in the eardrum
- problems with the ossicles, such as otosclerosis
In children, conductive hearing loss is relatively common due to fluid in the middle ear. In adults, we also see it after colds, ear infections or due to prolonged closure of the ear canal.
Is conduction loss temporary or permanent?
That depends entirely on the cause. And that’s immediately the good news: conduction loss is often temporary or treatable.
Examples of temporary causes include:
- earwax accumulation
- cold with middle ear pressure
- temporary fluid behind the eardrum
In these cases, hearing often recovers on its own or after simple treatment. With structural causes, such as otosclerosis or permanent damage to the eardrum, the hearing loss may be permanent, but even then there are often good solutions.
How is conduction loss determined?
A hearing test shows a typical pattern with conductive hearing loss. There is a difference between what you hear through air conduction and through bone conduction. We call that difference the air-bone difference.
For conduction loss:
- bone conduction is relatively good
- air conduction is reduced
This helps audiologists and ENT doctors accurately determine the type of hearing loss.
How is it different from sensorineural hearing loss?
Conductive hearing loss is often confused with sensorineural hearing loss, but the difference is important. With sensorineural hearing loss, the problem is in the inner ear or auditory nerve. Sound arrives but is not processed properly.
Briefly:
- conduction loss: problem in the transmission of sound
- sensorineural hearing loss: problem in processing sound
There is also a combination of the two: mixed hearing loss.
What complaints can you experience?
In addition to less hearing, other symptoms may occur. Not everyone has them all, but they are common:
- pressure sensation in the ear
- earache or feeling full
- temporary noise
- difficulty hearing in groups
Because sound is often still clear, people sometimes underestimate the problem. They think others are talking unclearly, while the problem is in the ear.
What can you do for conductivity loss?
Treatment depends on the cause. Sometimes hardly anything is needed, sometimes it is. Possible steps are:
- removal of earwax
- treatment of an ear infection
- wait for temporary moisture
- a medical intervention for structural problems
In situations where hearing loss cannot be restored (completely), a hearing aid may be the solution. With conductive hearing loss, a hearing aid often works very well because the inner ear still functions well.
How effective are hearing aids for conductive hearing loss?
Hearing aids are often very effective for conductive hearing loss. Because the problem is mainly in the softer passage of sound, amplification can solve a lot. In some cases, bone conduction is also chosen, where sound is conducted directly to the inner ear via vibration.
Which solution is most appropriate depends on the severity and cause of the hearing loss.
When should you take action?
If you notice that your hearing is suddenly or gradually deteriorating, it is wise not to keep waiting. Especially with symptoms such as pressure, pain or a full feeling in the ear, it is smart to have it evaluated.
Signs to take seriously include:
- continuous dull hearing
- difference between left and right
- complaints that persist for more than a few weeks
The sooner you know what’s going on, the simpler the solution is often.
In conclusion
Conduction loss may sound technical, but the idea behind it is actually quite logical. The sound wants to, but encounters obstacles along the way. Sometimes that’s a simple blockage, sometimes a structural problem. The important point is that conduction loss is often quite treatable or supportable.
So don’t walk around feeling that “everything is softer than before.” Your ears are not a volume knob that turns back on its own. Get them checked, understand what’s going on and address it. That’s a lot more pleasant to hear.
