Vibeholic is one speaker system that plays on a slightly different concept, it relies on the vibration principle to send audio via various objects including a paper box, a piece of wood, a postcard or even an umbrella which will be “transformed” into portable speakers thanks to Vibeholic’s mini module. A patent for the Vibeholic has been filed, so it is interesting to see when will they be granted it. Would make for a great experimental tool for those who want to find out just which material is better than others to transmit audio.