17.4 Exercise 3

A baggage handler stands on the edge of a runway as a landing plane approaches. Compared to the pitch of the plane as heard by the plane’s pilot, which of the following correctly describes the sensation experienced by the handler?

1. The frequency of the plane will be lower pitched according to the baggage handler and will become even lower pitched as the plane slows to a stop.
2. The frequency of the plane will be lower pitched according to the baggage handler but will increase in pitch as the plane slows to a stop.
3. The frequency of the plane will be higher pitched according to the baggage handler but will decrease in pitch as the plane slows to a stop.
4. The frequency of the plane will be higher pitched according to the baggage handler and will further increase in pitch as the plane slows to a stop.