Example 2: Whistle s1at10

s1at10 is equivalent to the hardcoded whistle s1 which is included in the software. This is a good example of limitations of the slower sampling rate of 10 frequency samples per second (fsps), because when there are large frequency variations between samples, e.g., 1000 Hz in some cases in this whistle, then the resulting whistles may be more linear than desired, i.e., without sufficient graduation or curves in the shape. A similar whistle at 40 fsps, s1at40, in a future post, will show the advantage of the faster sampling rate. Other whistles in future posts will show smaller variations between samples.

The approximate shape on a spectrogram:

__     +------------+
10 kHz |            |
__     |            |
__     |            |
__     |            |
_6 kHz |     oo  oo |
_5 kHz |    o  oo   |
__     |   o        |
_3 kHz | oo         |
__     |            |
__     |            |
_0 kHz +------------+
___      0        9 = 1 second

Indexes 0 to 9 at 10 fsps covers 1 second.

The effective maximum frequency that Seadragon 2.1 can emit is 10 kHz. Although Seadragon 2.1 can acquire frequencies has high as 24 kHz.

The xml code to insert in file signals_to_read.xml:

<object class="org.leafyseadragon.jse.signal.StoredSignal">
<void property="hz10ps">
<array class="java.lang.Double" length="10">
<void index="0">
<double>3000.0</double>
</void>
<void index="1">
<double>3000.0</double>
</void>
<void index="2">
<double>4000.0</double>
</void>
<void index="3">
<double>5000.0</double>
</void>
<void index="4">
<double>6000.0</double>
</void>
<void index="5">
<double>6000.0</double>
</void>
<void index="6">
<double>5000.0</double>
</void>
<void index="7">
<double>5000.0</double>
</void>
<void index="8">
<double>6000.0</double>
</void>
<void index="9">
<double>6000.0</double>
</void>
</array>
</void>
<void property="signalType">
<string>LEX_SIGNAL</string>
</void>
<void property="text">
<string>s1at10</string>
</void>
<void property="uid">
<string>s1at10</string>
</void>
</object>

Copyright (c) 2006 Serge Masse.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation. A copy of the license is included in http://www.gnu.org/licenses/fdl.txt