Termination of currently active sound signal of the alarm item
It is irrelevant for events (relevant only for alarms).
This method is used for terminating currently active sound signal of the alarm item. This method is not disabling the recurrence of the alarm item sound signal in the future, if its state is changed in order to meet the trigger condition of the alarm item (i.e. deactivation first, followed with activation) Therefore this method cannot be used for permanent alarm item sound signal deactivation.