The human ear has two functions: hearing and balance. During the hearing process, the ear receives a series of sound waves, discriminates between frequencies and transmits the auditory information to the brain, where it is interpreted. The ear is organized into three parts; 1-the outer ear, 2-the middle ear and 3-the inner ear. These three sections allow sound waves to pass through the hair cells of the organ corti, where the detection of sounds of different frequencies occurs and the information is transmitted to the brain. The Eustachian tube equalizes the pressure on each side of the eardrum. Energy transformations that occur during the path of a sound wave include the conversion of sound energy (the kinetic energy of moving particles) into mechanical energy as sounds pass through the middle ear, and then the conversion into electrochemical energy in the inner ear in the form of nerve impulses. to the brain are stimulated. Often, as humans, we take our hearing ability for granted, but some people aren't so lucky. Sometimes people are born "deaf", meaning they are unable to hear, and some p...