| Species |
Max
Range Typical |
TIME
Switch Position
|
Sounds
heard through loudspeaker
|
|
Time-expansion
sounds
|
. |
Ident
|
Tune
kHz
|
ms
|
Heterodyne
Sounds
|
|
Frequency
range
|
| Long
Eared |
20 ft
|
6 - 12
|
|
10
|
Short
duration frequency varying chirp. |
. |
90 - 25
|
|
40
|
|
Very
Short duration ‘ticks’ |
15 to 25
|
| Bechstein’s |
20 ft
|
8 - 16
|
|
20
|
Double
short duration chirps |
|
80 - 40
|
| 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
|
| |
Metallic
’chinks’ like echo-ing whiplash |
5 to10
|
| Lesser
Horsehoe |
20 ft
|
100-
115 |
115
|
1280
|
High
frequency pulsed tone |
|
60 - 120
|
| |
|
|
Pleasant
warbling tones |
10 to 15
|
| |
. |
80 - 100
|
|
1280
|
High
frequency pulsed tone |
|
40 - 100
|
| Greater
Horseshoe
|
50 ft
|
. |
85
|
|
Pleasant
warbling tones |
8 to 11
|
| Pipistrelle
55
kHz
|
45 ft
|
50 - 60
|
|
20
|
Medium
duration chirps |
. |
35 - 100
|
| . |
50 - 65
|
|
Hard
’clicks’ sometime with ‘watery’ effect |
10 to 15
|
| Pipistrelle
45
kHz
|
45 ft
|
40 - 55
|
. |
20
|
Hard
‘clicks’ sometime with ‘watery’ effect |
. |
. |
|
40 - 50
|
. |
. |
10 to 15
|
35 - 90
|
Daubenton
sound
|
. |
40 - 55
|
|
|
Medium
duration chirps |
. |
. |
|
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. |
![[Courtpan Design Ltd]](images/logo.gif){kind=logo}
