This document provides an overview of sound from a mathematical perspective. It discusses how sound is created through vibration, its propagation as a longitudinal pressure wave, and how frequency and wavelength are related through the speed of sound. The speed of sound varies according to the medium and environmental factors like temperature. Sound intensity decreases with the inverse square of distance from the source and is measured on the decibel scale. Common sources of sound production are also examined, including vocal cords, speakers, and musical instruments like the French horn.