Hearing

Moving and hitting each other, objects vibrate and create vibrations that are transmitted through the air. Vibrations perceived by the ear and converted to sounds of different intensity from the noise of the falling pins to revise supersonic aircraft, which takes off.
We hear because our ears respond to sound waves - slight change of air pressure. The ear converts these waves into electronic impulses and transmits them to the brain where they transformirovalsya sounds. Our ears are constantly detect the sound waves, and we learn how to respond to some sounds and ignore others.
The human ear includes three compartments outer, middle and inner ear. The outer ear consists of folds of skin and cartilage auditory canal that leads to the hidden part.