The ear is a complex organ and the cause of hearing loss can be found within various points: the outer ear, the middle ear, the inner ear or even the auditory nerve. Hearing loss is not always age-related. It can also be triggered by loud noises, infections, poisoning or injuries, or may be hereditary.
It is mainly the higher frequencies that are affected first in most cases. Because these are important for hearing the so-called voiceless consonants (f, s, p, t), the understanding of speech is often impaired at an early stage. Depending on the type of hearing loss, other symptoms appear, for example tinnitus, noise sensitivity, or dizziness. In almost all cases, hearing loss is permanent, and it is often difficult to predict how it will progress.