Date : December 28, 2006. Place : Inside a tram on a round trip from Ebisu-cho to Hamadera Ekimae on the Hankai Line (12:03- 13:46) in Osaka, Japan. Tsunoda captured solid vibrations using a piezo-ceramic sensor and a stethoscope, and Haco used her 'stereo bugscope' (two inductive microphones) system to catch electromagnetic sounds.