Piston effect platforms with a single tunnel, however, air quality worsens when relying on the piston effect alone for ventilation. This still allows for potential energy savings by taking advantage of the piston effect rather than mechanical ventilation where possible. Tunnel boom is a loud boom sometimes generated by high-speed trains when they exit tunnels. These shock waves can disturb nearby residents and damage trains and nearby structures. The perception of this sound by humans is similar to that of a sonic boom from supersonic aircraft, but unlike a sonic boom, tunnel boom is not caused by trains exceeding the speed of
Twang Twang Shock-A-Boom Twang Twang Shock-A-Boom Twang Twang Shock-a-Boom is an acoustic three-piece band led by Davíd Garza. The name is derived from the sounds of the guitar, bass, and drums. Twang Twang Shock-a-Boom was described by the Austin Chronicle as “one of the most breathtaking musical projects Austin has ever seen.” . For 10 months, the trio of Davíd Garza, Jeff Haley, and Chris Searles played humorous tunes with the bare-bones setup of guitar, upright bass, and a guitar case standing in for drums. It began when Garza and his music-school friends decided to go busk in the West Mall of Austin,