The general idea of this audio effect is the designation of the action that needs to be completed.

It can be used for example in a game when you need to solve a cipher or a riddle on some device.

It is suitable as a temporary lock signal, the sound of the signal of the enabled protection or an unread notification signal. A timer signal.

This signal is specially looped, some other signal should sound after it in order to “turn off” this signal.