SOUND DETECT & SOUND DETECT PRO USER MANUAL
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9-2-2 Weak and Strong Sounds
The device shows the strongest sound source in the field of view with a crosshair,
up to 3. The strongest sources depend on the selected mode; different modes
might display different sound sources.
When the focal tool is disabled the device shows not only the strongest sound
source, but also weaker sound sources. The strongest sound source is the field
of view is still marked with a crosshair. Sound sources will not be shown outside
the focal tool when it is enabled. Disable the focal tool when locating weaker
sound sources.
In order to see weaker sound sources in the presence of a strong sound source,
move or rotate the camera so that the strong sound source is clearly outside the
field of view.
Always keep in mind that any analysis is derived from the location marked by the
crosshair on the display.
9-2-3 Actual versus Reflected Sound
The device shows not only actual physical sound sources, but also sound
reflections. In order to verify a source shown on the display is an actual sound
source and not a reflection, move around to look at the source from different
directions. If the location of the source remains consistent, the source is an
actual sound source. If the location of the source moves along a surface or
completely disappears, the source is probably a reflection.
As the focus tools narrows the sound sources visible on screen, it can be useful
for finding actual and reflected sound sources. By moving the device around the
user may be able to tell which of the sources on screen are reflections.
If an actual sound source is large, e.g. a large vibrating surface, the source shown
on the display might be smaller than the actual source. The source might in this
case also move around as you move around the surface, depending on which
point of the surface is closest to the device. Be sure to adjust the frequencies on
the device to get an accurate picture of the sound source.
It is possible to adjust the dynamic range of the heatmap with the available quick
slider. By increasing the dynamic range, the user might be able to tell the actual
size of the sound source.
For air leak detection, use the Gas Leak Mode.
For Partial discharge inspections, use the Partial Discharge Mode.
Users should test the inspection area from different angles to assist in eliminating
reflected sounds and noise.
