diff --git a/Pentaradio_2010.mw b/Pentaradio_2010.mw
index 87d2dc5e..f8ddd35c 100644
--- a/Pentaradio_2010.mw
+++ b/Pentaradio_2010.mw
@@ -68,6 +68,7 @@ Es geht um Podcasting - Vorbereitung, Sendung, Nachbereitung
 ===Gäste===
 ==Hack des Monats==
 * [http://hacknmod.com/hack/make-a-diy-sonar-system-using-arduino/ DIY Sonar System using Arduino]
+* [http://singularityhub.com/2010/01/29/new-hearing-aid-uses-your-tooth-to-transmit-sound/ Hearing aid you wear on your tooth]
 
 ==Patent des Monats==
 ==news==