This is the most common type of hearing loss and it comes up when the auditory nerves(found in the inner ear) are damage of thinned due to old age, this type of loss is permanent as it is impossible to replace the nerve system. The auditory nerver which are hair-like structures are used to collect information on clarity and loudness of the sound and hence their loss is fatal.
d) Noise exposure
e) Tumour (etc.)
a) It becomes difficult to follow a conversation when two or more people are talking at the same time
b) Noise may become too loud or too quiet than it actually is.
c) Some sounds become difficult to hear
d) Difficult hearing women or children.
Since there is no cure for this type of loss we can introduce external devices to help us with the hearing like cochlear implants and hearing aid.