Applying the first way of cut material placing we
can reduce the source noise only by an adjustment of
technological factors, whereby in the material cutting the
noise sources arise which are described in the introductory
part of the article (Figures 1, 2). The second way reduces
noise, whereby as a source only the background noise
will stay; nevertheless the quality of the cutting process
due to abrasive cumulating on the surface of material
which disables visual control of the cutting process is
affected adversely. Another disadvantage is that on the
surface of cut material an abrasive layer is being created
obstructing water jet penetration into the material. At
the same time the requirements on individual factors are
increased, as e.g. mass flow of the abrasive type, pressure
or feed speed decelerating etc. (Figure 6b).