What you’ll learn2 learning objectivesChoose one objective for a focused lesson, or study the complete topic.7.3.1When a source of sound waves moves relative to a stationary observer, the• understand that when a source of sound waves moves relative to a stationary observer, the observed frequency is different from the source frequency (understanding of the Doppler effect for a stationary source and a moving observer is not required)Syllabus objective7.3.2The expression fο = f sv / (v ± vs) for the observed frequency when a source• use the expression fο = f sv / (v ± vs) for the observed frequency when a source of sound waves moves relative to a stationary observerSyllabus objective