Lesson 1: The Nature of a Sound Wave Mechanical Wave Longitudinal Wave Pressure Wave Lesson 2: Sound Properties and Their Perception Pitch and Frequency Intensity/Decibel Scale The Speed of Sound The Human Ear Lesson 3: Behavior of Sound Waves Interference and Beats The Doppler Effect and Shock Waves Boundary Behavior Reflection, Refraction, and Diffraction Lesson 4: Resonance and Standing Waves ...

The Doppler Effect and Sonic Booms Daniel A. Russell, Kettering University The sudden change in pitch of a car horn as a car passes by (source motion) or in the pitch of a boom box on the sidewalk as you drive by in your car (observer motion) was first explained in 1842 by Christian Doppler. His Doppler Effect is the shift in frequency and wavelength of waves which results from a source moving ...