A small video with the Tiramisu-speaker in operation
The sound you hear is picked up by the microphone of the camera, and
produced by the Tiramisu-loudspeaker. No tricks
The driving coil is the laser-up / laser-down mechanism of
an old CDrom-player.
And here you can see that I really made the speaker of a Tiramisu-cup:
The flexible edge for the paper-cone is made from a latex-glove (as used in
hospitals and so). After a few months it will have degraded to a sticky edge.
Note: August 2007 The speaker no longer exist ... it degraded indeed :-(