Modern airfoils need good airspeed control for optimum climb performance. The alarm tone is based not only on airspeed, but also on ballast, bank angle, and wing loading due to airmass acceleration. Audio over-range to 13 knots on x1 scale. The audio tone is clear and distinct, but not harsh. This means better thermal centering with less fatigue.
Most computers try to detect circling flight by looking at airspeed.
This doesn't work for Dolphin style flight or circling in rough air. Instead, we combine airspeed and acceleration inputs to detect circling. On standard class ships, automatic switching means reduced mental stress for the pilot. It also means reduced navigational errors. On flapped sailplanes, there is no need for tedious or expensive flap switch installation.