Hearing (/hɪərɪŋ(g)/), or auditory perception, is the physical sense of the to perceive sounds by detecting vibrations through one's ears. The academic field concerned with hearing is auditory science.
Hearing is necessary for the skill of listening, however it is not sufficient.
As a teacher it is important to try to look after your hearing. A hearing aid may be used to ameliorate hearing impairments.