Waves are disturbances that travel through space and time, carrying energy from one place to another. They can be described by properties like wavelength, frequency, and amplitude. Sound waves, in particular, are pressure waves that travel through a medium like air or water. When an object vibrates, it creates changes in air pressure that cause the molecules of air to collide with each other, creating a ripple effect that travels through the air. Our ears are sensitive to these pressure changes and translate them into nerve impulses that our brains interpret as sound. Understanding the properties of waves is crucial for understanding a wide range of phenomena, from the behavior of light and sound to the functioning of electronic devices.