Ontenna is a new user-interface device that can be put onto one's hair like a hair pin, transmitting sound by vibrations and light. It turns sound pressure within the range of 30dB-90dB into 256 levels of vibration and luminosity, transmitting the sound's features to the wearer. The rumbling pattern of the audio source is converted real-time into vibration and light, so that the sound's rhythm, pattern and magnitude can be perceived through your hair.