Vibe NVE-100 vibrating earphones

En-tech of Korea unveiled its Vibe NVE-100 vibrating earphones at the recently concluded SEK 2007, giving you an extra boost during your music listening experience. I wonder what are the signals that trigger the vibration motor though, as a constant buzz will get irritating after a while, even more so for those who are wearing glasses. Anyway, I seriously question the $110 price tag attached to the Vibe NVE-100, it sounds just way too expensive.