Question

people having a lack of hearing ability how they have

Answer 1

The people may have genetically modified for the lack of hearing or after some extend their ear parts such as eardrum,nerves present may have been damaged. Mostly the lack of hearing occur due some accidental situation. Thus causes lack in hearing

I hope this is helpful

Answer 2

Someone who is not able to hear as well as someone with normal hearing -hearing thresolds of 25 db or better in both ears---is said to have hearing loss....it can affected one ear both ear,,,,,and lead to difficulty in hearing loud sounds......!!!!