Amplifying without electricity

With an eager mind set on hi-tech development we kind of forgot about some good old natural techniques that consumes no energy at all. Science & Sons shows the way to smarter design.

This is an analogue amplifier for your earbuds:

Phonofone II instantly transforms any personal music player + earbuds into a sculptural audio console. Thorough passive amplification alone, this piecce exploits the virtues of horn acoustics to boost the audio output of standard earphones to up to 55 decibles* (or roughly the maximum volume of laptop speakers).