signal@@3	signal	gesture of indication	1
signal@@3	signal	hum	1
signal@@-	signal	indicator	2
signal@@1	signal	wavelength	1
signal@@2	signal	indication of risk	1
signal@@2	signal	flare	3
signal@@2	signal	indication	1
signal@@2	signal	sign	1
signal@@2	signal	flashing sign	1
signal@@-	signal	frequency signal	2
signal@@-	signal	e.g.	1
signal@@2	signal	data communication	1
signal@@2	signal	warning indicator	1
signal@@2	signal	traffic sign	1
signal@@2	signal	broadcast signal	1
signal@@1	signal	frequency signal	2
signal@@1	signal	reception	2
signal@@2	signal	flag	1
signal@@3	signal	alert	3
signal@@2	signal	warning sign	1
signal@@3	signal	warning	2
signal@@2	signal	sos	1
signal@@1	signal	communication	1
signal@@2	signal	warning signal	1
signal@@2	signal	warning	3
signal@@2	signal	directional signal	1
signal@@3	signal	sign	7
signal@@3	signal	nod	1
signal@@2	signal	trigger	1
signal@@1	signal	broadcast	2
signal@@1	signal	alert	1
signal@@3	signal	indicator	3
signal@@3	signal	sound	1
signal@@3	signal	flash signal	1
signal@@3	signal	gesture	1
signal@@2	signal	communication method	1
signal@@2	signal	beacon	5
signal@@2	signal	data transmission	1
signal@@2	signal	indicator	1
signal@@2	signal	frequency signal	1
signal@@3	signal	transmission	1
signal@@1	signal	radio signal	1
signal@@1	signal	indicator	3
signal@@2	signal	alarm	4
signal@@2	signal	alert	6
signal@@1	signal	broadcast signal	2
signal@@-	signal	bandwitdth	1
signal@@3	signal	generating signal	1
signal@@3	signal	gesturing sign	1
signal@@3	signal	indication	2
signal@@1	signal	transmission	4
signal@@1	signal	conduction	1
signal@@1	signal	energy	1
signal@@1	signal	beacon	1
signal@@-	signal	wavelength	1
signal@@3	signal	nonverbal communication	1