The propagation of sound waves through different mediums is referred to as acoustic transmission. Sound travels by vibrating particles in a medium, which can include solids, liquids, and gases. Each medium affects sound's speed and wavelength. For example, sound travels fastest in solids due to closely packed particles, while it moves slower in gases. The study of how sound waves propagate and interact with materials is crucial in various fields, including engineering, medicine (e.g., ultrasound), and environmental science.