Hitachi Maxell today revealed the HP-NC20.IPS earphones today,providing noise-cancellation technology that is able to cancel up to 20dB of noise. The Hitachi Maxell HP-NC20.IPS Earphones are compatible with 4G iPods, 1G and 2G iPod touches. Just remember that it will reduce battery life by up to 66% when connected.
The HP-NC20.IPs will only be available in Japan for the time being (from December 12) and cost $80.