<P> There are four main types of hearing loss, conductive hearing loss, sensorineural hearing loss, central deafness and combinations of conductive and sensorineural hearing losses which is called mixed hearing loss . An additional problem which is increasingly recognised is auditory processing disorder which is not a hearing loss as such but a difficulty perceiving sound . </P> <Ul> <Li> Conductive hearing loss </Li> </Ul> <Li> Conductive hearing loss </Li> <P> Conductive hearing loss is present when the sound is not reaching the inner ear, the cochlea . This can be due to external ear canal malformation, dysfunction of the eardrum or malfunction of the bones of the middle ear . The ear drum may show defects from small to total resulting in hearing loss of different degree . Scar tissue after ear infections may also make the ear drum dysfunction as well as when it is retracted and adherent to the medial part of the middle ear . </P>

What is it called when you can't be within a certain distance from someone