| 摘要 |
PROBLEM TO BE SOLVED: To search for a noise source from construction work machines in a site.SOLUTION: A noise source search system 1 according to the present invention includes: a GPS receiver 10 that is mounted on each of construction work machines 3 operating in a site 2; a c-c microphone 12 that is provided to a slave unit 11 installed in the vicinity of a boundary of the site 2 and measures sound pressure of the generated sound; an arrival angle calculation unit 44 that calculates an arrival angle of the generated sound by using the sound pressure value; and a composite image creation unit 54 that overlaps the arrival angle as an angle display image on a plane view and plots the positions of the construction work machines 3 on the plane view. The noise source search system 1 further includes: an arrival frequency counting unit 45 that counts the number of arrival of the generated sound for each arrival angle by using arrival angle data; and a noise index creation unit 46 that creates an in-site noise level Lby using a result of the count and a noise level L measured by a noise level meter 13. |
