How do sound travels through air?
Sound travels in air as a series of compressions and rarefactions. When an object vibrates it will move back and forth. As it moves forth, it pushes adjacent air particles. This is a compression: an area of high pressure that moves along the direction of the sound wave.
How does the sound travel?
Sound vibrations travel in a wave pattern, and we call these vibrations sound waves. Sound waves move by vibrating objects and these objects vibrate other surrounding objects, carrying the sound along. Sound can move through the air, water, or solids, as long as there are particles to bounce off of.
How do longitudinal waves travel through air?
For a sound wave traveling through air, the vibrations of the particles are best described as longitudinal. Sound waves in air (and any fluid medium) are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves.