diff --git a/src/science_signal/signal.py b/src/science_signal/signal.py
index 069998b..efe28e4 100644
--- a/src/science_signal/signal.py
+++ b/src/science_signal/signal.py
@@ -6,7 +6,7 @@ from numpy import (
     float64,
     linspace,
     array,
-    logical_and,
+    logical_or,
     sin,
     where,
     arange,
@@ -120,7 +120,7 @@ class Signal:
             end = max(abs(freq_x))
 
         index_to_remove = where(
-            logical_and(abs(freq_x) <= start, abs(freq_x) >= end)
+            logical_or(abs(freq_x) <= start, abs(freq_x) >= end)
         )
         freq_y[index_to_remove] = 0
         y = irfft(freq_y)