Human Ear Sound Transfer

This model introduces the **physics of hearing**. The **human ear** is divided into three main sections: **the outer, middle, and inner ear**.



We present the journey of a sound wave from the outermost part to the innermost part which transmits a signal to the brain. *The outer part collects and focuses a sound wave*. The wave then travels through the **ear canal** until it meets the **eardrum**. The pressure fluctuations of the sound wave make the **eardrum vibrate**. The **three small bones** transmit the signal through to the **inner ear**. The sound waves are transmitted through the liquid in the inner ear and interpreted as sounds by the brain.



The inner ear, made of the **semicircular canals, the cochlea, and the auditory nerve**, is filled with fluid. The fluid allows the body to detect quick movements and maintain balance. **Ion channels** in inner-ear receptor cells switch **electrical conductivity** depending on **lateral deflection** of the sensors where they are located.