Hearing loss can take many different forms and occur from a number of causes, and to understand them you must understand the way we hear. Along with the eardrum and the ear canal, the outer ear is the portion of the ear on the exterior of the head which collects sounds. The eardrum can also be viewed as part of the middle ear, an area that also includes the 3 tiny bones called ossicles that carry the vibrations of sound and send them to the inner ear. The inner ear has three key parts – the cochlea, the 2 semi-circular canals (important for balance) and the acoustic nerves which send the sound signals to the brain. All of this is incredibly sophisticated and delicate, and a problem in any section can lead to hearing loss. Hearing loss is usually split into four primary classifications.

Conductive hearing loss is due to something hindering the transmission of sound in the outer or middle ear. This form of hearing loss can often be remedied by medication or a surgical procedure; if surgery isn’t a possibility, it can be treated with hearing aids.

Damage to the inner ear, including the cochlea, hair cells lining the inner ear, or the acoustic nerves is called sensorineural hearing loss. Sensorineural hearing loss can usually not be treated using medication or surgery, but its effects can be minimized using hearing aids to allow the person to hear more normally.

The third classification is mixed hearing loss, which is a combination of conductive and sensorineural hearing loss, and which can often be treated using the same combinations of surgery, medication, and hearing aids.

Central hearing loss occurs when sound enters the ear normally, but because of damage either to the inner ear (especially to the cochlea) or to the auditory nerves, it cannot be organized in a way that the brain can understand.

Each of these four main classifications contain several sub-categories, such as the degree of hearing loss, which can be mid-level, moderate, severe, or profound. Additional sub-categories include whether the hearing loss occurs in one ear or both ears (unilateral vs. bilateral), whether it occurs at the same degree in both ears (symmetrical vs. asymmetrical), and whether the hearing loss happened before or after the person learned to speak (pre-lingual vs post-lingual). Additional sub-categories of hearing loss includes whether it is progressive vs. sudden, whether the hearing loss is fluctuating vs. stable, and whether the hearing loss was present at birth (congenital) or developed later in life (acquired). If you suffer from any of these forms of hearing loss, our specialists can help to diagnose it and then to treat it most effectively.