diff --git a/src/Units-Core/NamedUnit.class.st b/src/Units-Core/NamedUnit.class.st
index 6713781..61dddcf 100644
--- a/src/Units-Core/NamedUnit.class.st
+++ b/src/Units-Core/NamedUnit.class.st
@@ -197,7 +197,13 @@ NamedUnit class >> initializeOtherUnits [
 		name: 'watt'
 		pluralName: 'watts'
 		value: (1 units: ((Unit ampere) * (Unit volt))).
-		
+	self
+		abbreviation: 'dB'
+		name: 'decibel'
+		pluralName: 'decibels'
+		value: ((10 raisedTo: ((1 - 30) / 10)) units: Unit watt).
+	self flag:'labordep: how to convert this unit to watt because this is not a *?'.
+	
 	DerivedUnit
 		abbreviation: 'deg'
 		name: 'arcdegree'
diff --git a/src/Units-Core/Number.extension.st b/src/Units-Core/Number.extension.st
index 4864e5b..7296475 100644
--- a/src/Units-Core/Number.extension.st
+++ b/src/Units-Core/Number.extension.st
@@ -152,6 +152,18 @@ Number >> cm [
 	^self units: #centimeter
 ]
 
+{ #category : '*Units-Core' }
+Number >> dB [
+
+	^ self decibel
+]
+
+{ #category : '*Units-Core' }
+Number >> decibel [
+
+	^ self units: #decibel
+]
+
 { #category : '*Units-Core' }
 Number >> degreeCelsius [
 
diff --git a/src/Units-Core/Unit.class.st b/src/Units-Core/Unit.class.st
index 1e708e1..de97091 100644
--- a/src/Units-Core/Unit.class.st
+++ b/src/Units-Core/Unit.class.st
@@ -187,6 +187,12 @@ Unit class >> coulombs [
 	^self coulomb
 ]
 
+{ #category : 'power units' }
+Unit class >> dB [
+
+	^ self decibel
+]
+
 { #category : 'time units' }
 Unit class >> day [
 
@@ -199,6 +205,12 @@ Unit class >> days [
 	^ self day
 ]
 
+{ #category : 'power units' }
+Unit class >> decibel [
+
+	^ NamedUnit named: 'decibel'
+]
+
 { #category : 'miscellaneous units' }
 Unit class >> deg [
 
@@ -595,6 +607,12 @@ Unit class >> micrograms [
 	^self microgram
 ]
 
+{ #category : 'time units' }
+Unit class >> microsecond [
+
+	^ self microseconds
+]
+
 { #category : 'time units' }
 Unit class >> microseconds [