Sound is the vibration that travels through air or another medium, detectable by the human ear. It is produced by objects or sources that create waves of pressure, which then propagate as sound waves. These waves vary in frequency, amplitude, and timbre, determining pitch, volume, and tone. Sound can be natural, like birdsong or thunder, or artificial, like music or machinery. It plays a crucial role in communication, entertainment, and environmental awareness. In physics, sound is studied as an acoustic phenomenon, while in daily life, it shapes our experiences—from soothing melodies to warning signals. Whether subtle or intense, sound influences emotions, memory, and spatial perception, making it an essential element of human existence and interaction with the world.