How We Hear and the Types of Hearing Loss
- Oct 8, 2025
- 2 min read
Updated: Oct 13, 2025
When you think about ears, you probably just picture the part you can see on the side of your head. But our ears are far more complex than that! This incredibly intricate organ is made up of three main parts—the outer ear, the middle ear, and the inner ear—all working together to help us hear.
The Anatomy of Hearing
The outer ear is what you can see and feel. It consists of the pinna (the visible part of the ear) and the ear canal. Its main job is to collect sound waves and funnel them into the ear canal, where the sound is amplified.
Once sound waves reach the middle ear, they cause the eardrum to vibrate. These vibrations travel through the three smallest bones in your body, called the ossicles. Here, the sound energy is transformed from sound waves into mechanical vibrations and amplified even further.
The inner ear is the sensory part of our hearing system. The vibrations from the middle ear cause a fluid to move inside the cochlea, a tiny, snail-shaped hearing organ. This fluid movement stimulates thousands of microscopic hair cells, which send electrical impulses down the auditory nerve directly to your brain. Your brain then interprets these impulses, giving meaning to the sounds you hear.
Understanding Hearing Loss
Now that you understand how hearing works, it's easier to see how hearing loss can occur. If any of the parts of the ear are not working properly, it can affect your ability to hear. The type of hearing loss depends on where the problem is located. There are three main types:
Conductive Hearing Loss
This occurs when sound cannot properly get through the outer or middle ear. This can make sounds seem softer, but their clarity is usually not affected. This type of hearing loss can often be treated medically or surgically.
Some common causes include:
Middle ear infection or fluid
Excessive earwax
A perforated eardrum
Eustachian tube dysfunction
Sensorineural Hearing Loss
This happens when the inner ear (cochlea) or the auditory nerve is damaged. The sound signals are not accurately sent to the brain, which means sounds are not only softer but their clarity is also affected. This type of hearing loss is almost always permanent.
Some common causes include:
Aging
Excessive noise exposure
Heredity
Diabetes
Head trauma
Mixed Hearing Loss
This occurs when there is a conductive and a sensorineural component at the same time. This means there is damage to both the outer or middle ear and the inner ear or auditory nerve simultaneously.
Take the Next Step
If you suspect you may have any type of hearing loss, the only way to know for sure is to have a complete hearing assessment. Taking this first step is a key part of your overall wellness. Our team is here to provide an assessment and help you find a solution that's right for you.
