VT UltraMic-384 Hardware Operation Manual
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The trigger is applied to all the recordings, please use it with care.
2
BIRD, INSECT AND BAT CALLS
“I need to record a
bird song
in the morning from 6:00 to 9:00 then from 19:00 to 20:00.
I want to record
bat calls
from 20:10 up to 5:10. I need also to record
cicada and other insect calls
in ultrasonic range to
from 11:00 to 16:00”.
CONSIDERATIONS
: First, we need to understand the sampling
rate for each kind of animals.
Bat calls are in ultrasonic range; the greatest part of calls is below 100Khz,
but we want to be sure to capture all the calls even at higher frequencies.
Therefore, we set 384Khz for bat calls since the bandwidth is about the half
of the sampling rate, and for 384Khz the bandwidth is about 190 Khz and we
can record all bat calls.
A bird song is in audio range, and for a better quality recording, we set
48Khz as sampling rate for bird songs.
Cicada calls too are in audio range but some insects go over 20Khz and we
set 96Khz sampling rate for insects, and consequently the bandwidth is
about 48Khz.
HOW TO
:
Follow the steps as in chapter 1
Bat calls
from point
A
to point
C
.
D – In Timing page set the
Time Mode
and click on add time.
E – Insert the following times
-
At: 6:00 for: 3:00 sampling frequency 48Khz.
-
At: 19:00 for: 1:00 sampling frequency 48Khz.
-
At: 20:10 for: 9:00 sampling frequency 384Khz.
-
At: 11:00 for: 5:00 sampling frequency 96Khz.
Follow the steps from point F to H like in the previous chapter 1
Bat Calls
.