One of the main functions of the ear is to transmit to the brain the energy received from sounds. The ear acts as a dynamo which feeds the nervous system to maximize its efficiency. Tiredness, headaches at the end of the school day, feelings of boredom and laziness, frustration, moodiness, oversensitivity at school, at home or with friends - all these characteristics may be related to faulty listening.
From Madaule, P. [1998] “Tuning the ear of those who can’t learn”