Speakers come in different varieties and sound qualities but their operating design is pretty much the same. They blast air particles in different manners to create the perfect waves of disturbance that you ears recognize as sounds. Many people have difficulty picturing the actual working of a speaker even though most of us have seen it from the inside.
Luckily I came across these amazing GIFs courtesy of Animagraffs.com that totally nail the visual explanation of sound emitting from the speakers.