diff --git a/lasp/tools/tools.py b/lasp/tools/tools.py
index befb0fb..90a8be9 100644
--- a/lasp/tools/tools.py
+++ b/lasp/tools/tools.py
@@ -48,7 +48,7 @@ class SmoothingWidth(Enum):
     twelve = (12, '1/12th octave smoothing')
     twfo = (24, '1/24th octave smoothing')
     ftei = (48, '1/48th octave smoothing')
-#    hundred = (100, '1/100th octave smoothing')  # useful for removing 'grass'
+    hundred = (100, '1/100th octave smoothing')  # useful for removing 'grass'
 
     @staticmethod
     def fillComboBox(cb):
@@ -69,7 +69,7 @@ class SmoothingWidth(Enum):
 
 
 class SmoothingType:
-    levels = 'l', 'Levels'
+    levels = 'l', 'Levels'  # [dB]
     # tf = 'tf', 'Transfer function',
     ps = 'ps', '(Auto) powers'