Shinkansen 700 Series with Duck Bill Nose
Shinkansen N700 series was developed with the nose have the “duck bill” design, it is intended to reduce the impact of boom noise when Shinkansen entering the tunnel. If Shinkansen enter into the tunnel at speeds above 200 km / h, then at the other end of the tunnel will occur deafening sound termed “boom noise”. This phenomenon occurs very extreme in the previous Shinkansen series that have the conventional nose. This phenomenon occurs as a hand pump tube driven by the pump valve, so that at the end of the tube there is a high air pressure and causing the boom noise. The longer the tunnel, the higher the sir pressure that will occurs. Shinkansen 700 series with a duck bill nose design, visually appear to be less good, but in terms of technology turns with such a design can reduce boom noise almost half if compared with conventional nose design. reducing "boom noise" The technology of “duck bill” nose not only reducing the phenomenon of boom noise but also