Bat Detector Tranquility

Characteristic Bat sounds heard onTranquillity II

Species	Max Range Typical	TIME Switch Position			Sounds heard through loudspeaker
Time-expansion sounds	.	Ident	Tune kHz	ms	Heterodyne Sounds	Duration (secs)	Frequency range kHz
Long Eared	20 ft	6 - 12		10	Short duration frequency varying chirp.	.	90 - 25
Long Eared	20 ft	6 - 12	40		Very Short duration ‘ticks’	15 to 25	90 - 25
Bechstein’s	20 ft	8 - 16		20	Double short duration chirps		80 - 40
Bechstein’s	20 ft	8 - 16	45 – 50		Very short duration ‘ticks’	20 to 30	.
Noctule sound	500 ft	20 - 25		40	Long duration frequency chirp		.
			20 - 25	320	Social calls as above	1	15 - 75
			20 - 25		Metallic ’chinks’ like echo-ing whiplash	5 to10	15 - 75
Lesser Horsehoe	20 ft	100- 115	115	1280	High frequency pulsed tone		60 - 120
Lesser Horsehoe	20 ft				Pleasant warbling tones	10 to 15	60 - 120
	.	80 - 100		1280	High frequency pulsed tone		40 - 100
Greater Horseshoe	50 ft	.	85		Pleasant warbling tones	8 to 11	40 - 100
Pipistrelle 55 kHz	45 ft	50 - 60		20	Medium duration chirps	.	35 - 100
Pipistrelle 55 kHz	45 ft	.	50 - 65		Hard ’clicks’ sometime with ‘watery’ effect	10 to 15	35 - 100
Pipistrelle 45 kHz	45 ft	40 - 55	.	20	Hard ‘clicks’ sometime with ‘watery’ effect	.	.
Pipistrelle 45 kHz	45 ft	40 - 55	40 - 50	.	.	10 to 15	35 - 90
Daubenton sound	.	40 - 55			Medium duration chirps	.	.
Daubenton sound	45 ft	30 - 100	30 - 100	20	.	12 to 15	30 - 100
All species Using 280ms range	Using the 1280ms time position it will be probable that a feeding buzz will be captured. This gives rise to a ‘laughter’ effect (sound) & demonstrates the progressive increase in repetition rate when the bat is echo locating close to it’s prey. This range can also be used for social calls when there is a large gap between successive calls.