Consider the case of an observer moving toward a source of sound while the source moves away from the observer. See figure 2 below.

Consider the case of an observer moving toward a source of sound while the source moves away from the observer. See Figure 2. V source observer source observer Figure 2. Diagram of the situation in Exercise 2. a. Describe how the observer can experience an increase in the signal's frequency. b. Describe how the observer can experience a decrease in the signal's frequency. c. Describe how the observer can experience the exact frequency of the signal