Hearing tests assess your ability to hear. Normal hearing occurs when sound waves enter your ear and cause your eardrum to vibrate. The vibration causes the waves to travel further into the ear, where nerve cells relay sound information to your brain. This data is converted into the sounds you hear. Hearing loss occurs when one or more elements of the ear, the nerves inside the ear, or the area of the brain that controls hearing malfunction. Hearing loss is classified into three types: Sensorineural deafness (also known as nerve deafness). This form of hearing loss is caused by an issue with the ear anatomy and/or the nerves that govern hearing. It might be present from birth or develop later in life. Sensorineural hearing loss is usually irreversible. The severity of this form of hearing loss ranges from modest (inability to hear specific noises) to severe (inability to hear any sounds). Conductive. A blockage of sound transmission into the ear causes this form of hearing loss. It can happen at any age, but it is more common in infants and young children, and it is frequently caused by ear infections or fluid in the ears. Conductive hearing loss is typically mild, short-term, and curable.
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