diff --git a/test/java/foundation/pEp/pitytest/utils/SlowFilteredNoise.java b/test/java/foundation/pEp/pitytest/utils/SlowFilteredNoise.java
new file mode 100644
index 0000000..8a20595
--- /dev/null
+++ b/test/java/foundation/pEp/pitytest/utils/SlowFilteredNoise.java
@@ -0,0 +1,143 @@
+package foundation.pEp.pitytest.utils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class SlowFilteredNoise {
+    private List<RangeInt> selection = new ArrayList<>();
+    private List<RangeInt> filter = new ArrayList<>();
+
+    private RangeInt bandwidth = new RangeInt(0);
+
+    public SlowFilteredNoise() {
+    }
+
+    public SlowFilteredNoise(List<RangeInt> selection, List<RangeInt> filter) {
+        setSelection(selection);
+        setFilter(filter);
+    }
+
+    public SlowFilteredNoise(RangeInt selection, RangeInt filter) {
+        addSelection(selection);
+        addFilter(filter);
+    }
+
+    public List<RangeInt> getSelection() {
+        return selection;
+    }
+
+    public void setSelection(List<RangeInt> selection) {
+        if (selection != null) {
+            this.selection = selection;
+        } else {
+            this.selection.clear();
+        }
+        calculateBandwitdth();
+    }
+
+    public List<RangeInt> getFilter() {
+        return filter;
+    }
+
+    public void setFilter(List<RangeInt> filter) {
+        if (filter != null) {
+            this.filter = filter;
+        } else {
+            this.filter.clear();
+        }
+    }
+
+    public void addSelection(RangeInt rng) {
+        if (rng != null) {
+            this.selection.add(rng);
+        }
+        bandwidth = calculateBandwitdth();
+    }
+
+    public void addFilter(RangeInt rng) {
+        if (rng != null) {
+            this.filter.add(rng);
+        }
+    }
+
+    public RangeInt getBandwidth() {
+        return bandwidth;
+    }
+
+    public RangeInt calculateBandwitdth() {
+        RangeInt ret = new RangeInt(0);
+        int min = 0;
+        int max = 0;
+        if (this.selection.isEmpty()) {
+            ret.setMinMax(0);
+        } else {
+            min = selection.get(0).effectiveMin();
+            max = selection.get(0).effectiveMax();
+            for (RangeInt sel : this.selection) {
+                if (sel.effectiveMin() < min) {
+                    min = sel.effectiveMin();
+                }
+                if (sel.effectiveMax() > max) {
+                    max = sel.effectiveMax();
+                }
+            }
+            ret.setMinMax(min, max);
+        }
+        return ret;
+    }
+
+    public int getNext() {
+        int ret = 0;
+        boolean candidatePositive = false;
+        while (!candidatePositive) {
+            int candidate = TestUtils.randomInt(bandwidth);
+            if (this.selection.isEmpty()) {
+                candidatePositive = true;
+                ret = candidate;
+            } else {
+                if (this.contains(selection, candidate)) {
+                    if (!this.contains(filter, candidate)) {
+                        candidatePositive = true;
+                        ret = candidate;
+                    }
+                }
+            }
+        }
+        return ret;
+    }
+
+    private boolean contains(List<RangeInt> rngList, int val) {
+        boolean ret = false;
+        for (RangeInt rng : rngList) {
+            if (rng.contains(val)) {
+                ret = true;
+                continue;
+            }
+        }
+        return ret;
+    }
+
+    private String rangeListToString(List<RangeInt> rngl) {
+        String ret = "";
+        int i = 0;
+        for (RangeInt rng : rngl) {
+            ret += "Selection nr: " + i + "\n";
+            ret += rng.toString();
+            i++;
+        }
+        return ret;
+    }
+
+
+    @Override
+    public String toString() {
+        String ret = "";
+        ret += "Selection Ranges\n";
+        ret += rangeListToString(selection);
+        ret += "\nFilter Ranges\n";
+        ret += rangeListToString(filter);
+        ret += "\nBandwidth\n";
+        ret += getBandwidth() + "\n\n";
+        return ret;
+    }
+}