Set of 8 knock knock sound effects as if someone were knocking from behind the screen of a cellphone, tablet, laptop or computer monitor in order to give us an alert, warning, annouce or notice.

Included files / length:
Knock knock 1 fast / 0:00.815 (<1 second)
Knock knock 2 slow / 0:01.112
Knock knock 3 fast / 0:01.008
Knock knock 4 slow / 0:01.016
Knock knock 5 fast / 0:01.294
Knock knock 6 slow / 0:01.069
Knock knock 7 fast / 0:00.817
Knock knock 8 slow / 0:00.796