Xmic
24/01/05
MAN-095-0001 Revision B
© Palmer Environmental Ltd 2005
Page 10
Filter Selection
To clarify the leak noise, background or unwanted noise frequencies can be filtered
out using a combination of the controls on the Xmic. Unwanted frequencies can be
filtered out via the bandpass, bandwidth and filter position buttons.
There are two modes of operation – survey mode and minimum level profiling mode
(MLP)
Survey Mode
In survey mode, the gain level can be adjusted for optimum volume and the filters
can be adjusted to reduce unwanted ambient noise. To locate the position of an
underground leak the microphone foot is placed on the ground above the line of the
suspect pipe and the readings observed.