Propagation of Acoustic Waves in Air

This chapter specifically discusses the propagation of acoustic waves in air. By considering the source of elasticity of air, we derive the equation of motion and corresponding wave equations. After these discussions of wave dynamics, we touch on the sounds we hear. We briefly discuss how human ears conceive and process sound waves. We consider how musical instruments generate their unique sounds. Toward the end of the chapter, we discuss amplitude and frequency modulations as methods to transmit sound waves over a distance.