Yoshitaka Nakajima Hideki Kashioka Nick Campbell Kiyohiro Shikano Non-Audible Murmur (NAM) Recognition. 1-4 2006 89-D IEICE Transactions 1 http://dx.doi.org/10.1093/ietisy/e89-d.1.1 db/journals/ieicet/ieicet89d.html#NakajimaKCS06