From 2d5ff37272f83b7b4d55db7163d281a860060276 Mon Sep 17 00:00:00 2001
From: Christopher Granade <cgranade@cgranade.com>
Date: Fri, 5 Apr 2013 22:53:11 -0400
Subject: [PATCH 1/2] Added log-intensity and log-power units.

---
 quantities/unitquantity.py   |  8 ++++++++
 quantities/units/__init__.py |  3 +++
 quantities/units/logunits.py | 27 +++++++++++++++++++++++++++
 3 files changed, 38 insertions(+)
 create mode 100644 quantities/units/logunits.py

diff --git a/quantities/unitquantity.py b/quantities/unitquantity.py
index 9ecc0eb..fc4d3e8 100644
--- a/quantities/unitquantity.py
+++ b/quantities/unitquantity.py
@@ -382,6 +382,14 @@ class UnitInformation(IrreducibleUnit):
 class UnitCurrency(IrreducibleUnit):
 
     _primary_order = 9
+    
+class UnitLogIntensity(IrreducibleUnit):
+
+    _primary_order = 10
+    
+class UnitLogPower(IrreducibleUnit):
+
+    _primary_order = 11
 
 
 class CompoundUnit(UnitQuantity):
diff --git a/quantities/units/__init__.py b/quantities/units/__init__.py
index 48a34fe..ed74fae 100644
--- a/quantities/units/__init__.py
+++ b/quantities/units/__init__.py
@@ -42,6 +42,9 @@
 from . import length
 from .length import *
 
+from . import logunits
+from .logunits import *
+
 from . import mass
 from .mass import *
 
diff --git a/quantities/units/logunits.py b/quantities/units/logunits.py
new file mode 100644
index 0000000..11a3448
--- /dev/null
+++ b/quantities/units/logunits.py
@@ -0,0 +1,27 @@
+"""
+"""
+from __future__ import absolute_import
+
+from ..unitquantity import UnitLogIntensity, UnitLogPower, UnitQuantity
+
+bel = UnitLogIntensity(
+    'bel',
+    symbol='bel'
+)
+decibel = dB = UnitQuantity(
+    'decibel',
+    bel / 10,
+    'dB'
+)
+
+bel_milliwatt = UnitLogPower(
+    'bel-milliwatt',
+    symbol='Bm'
+)
+decibel_milliwatt = dBm = UnitQuantity(
+    'decibel-milliwatt',
+    bel_milliwatt / 10,
+    symbol='dBm'
+)
+
+del UnitLogIntensity, UnitLogPower, UnitQuantity

From 96b67a3a1cca461ac664656aae855d2ec61b22cc Mon Sep 17 00:00:00 2001
From: Christopher Granade <cgranade@cgranade.com>
Date: Sat, 13 Apr 2013 15:14:44 -0400
Subject: [PATCH 2/2] Fixed problem with string representation.

---
 quantities/units/logunits.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/quantities/units/logunits.py b/quantities/units/logunits.py
index 11a3448..4594515 100644
--- a/quantities/units/logunits.py
+++ b/quantities/units/logunits.py
@@ -15,11 +15,11 @@
 )
 
 bel_milliwatt = UnitLogPower(
-    'bel-milliwatt',
+    'bel_milliwatt',
     symbol='Bm'
 )
 decibel_milliwatt = dBm = UnitQuantity(
-    'decibel-milliwatt',
+    'decibel_milliwatt',
     bel_milliwatt / 10,
     symbol='dBm'
 )