Japan's quiet supersonic airplane

This prototype of quiet supersonic airplane developed by Japan Aerospace Exploration Agency, will travel very quietly at speeds that exceed the sound.

The Japan Aerospace supersonic passenger jet for up to 50 people, because of its extended nose design, will reduce noise to about one-fourth of levels generated by the Concorde.

In August the eight meters long unmanned plane will conduct test flights in Sweden, to study its noise reduction levels.

via io9