(all-clear signal) 55 Continuous tone, PFEER gasalarm 57 w. EN54-3 Continuous tone, UK BS 5839-1 60 Continuous tone 63 Continuous tone 67 Continuous tone, Germany KTA 3901 (all-clear signal) 88 Interrupted [...] request. DS sounders Audio-Number Description Graphic Audio Sample 2 : EN54-3 Sawtooth, DIN tone 33404-3 Germany (emergency signal), PFEER PTAP 15 Slow whoop, evacuation alarm Netherlands NEN 2575 23 Siren [...] tone, Sweden SS 031711 (emergency signal) 100 Interrupted tone, industrial alarm Germany 108 Interrupted tone 112 Interrupted tone, ISO 8201 (emergency evacuation signal) 116 Interrupted tone, IMO (leave