Olympics Loudspeaker

PatentYogi_In the Olympics, the gun used to signal the beginning of a race gave an advantage to the athlete in the lane closet to the gun

Here is a patent application for a starting block with sensors for pressure, a step sensor for determining where the runner’s first step out of the starting blocks occurs, a laser ruler and loudspeaker. 

Patent Information
Publication number: US20140221159 A1
Patent Tile: Force feedback starting blocks
Publication date: 7 Aug 2014
Filing date: 20 Dec 2013
Priority date: 21 Dec 2012
Inventors: Wendell Lawrence
Original Assignee: Wendell Lawrence