（Investigation of Environmental Vibration at Bayon Temple, Angkor Monument）
Environmental vibration at the Bayon temple has been visualized by applying vibration sensing and mapping technologies. At he Bayon temple which lot of tourists are visiting during a whole year, vibration induced by them reached to considerable level. Following figure shows the look of a measurement on the site. The next figure indicates the vibration mapping result which is overlaied the vibration level to the top view of the Bayon temple. The warm colour indicates strong vibration and the cold colour indicates weak vibration, respectively. It was confirmed that strong vibration concentrated at around the entrance of the temple, the entrance of the cloister and famous statues. It indicates that tourists concentrated at these points. This sort of information is very useful for the management of temple such as setting of a series of arrows and limit on tourists.