Pulse phenomena refer to the rapid changes in physical quantities that occur over a short time period. These changes can be observed in various fields, such as physics and biology. For example, in physics, pulse phenomena can describe the behavior of waves, like sound or light, when they travel through different mediums. In biology, pulse phenomena often relate to the heartbeat, where the heart pumps blood in rhythmic intervals. This can be measured using devices like a stethoscope or a pulse oximeter. Understanding these phenomena helps in diagnosing health conditions and studying wave behavior in different environments.