The attention of the world is drawing attention to the candlelight vigils of the Republic of Korea.
October 29, 2016. Starting from the first candlelight vigil, the fifth candlelight vigil has been held, and the
6th and 7th candlelight vigils are expected to be held in the future. There is a big difference in the size
of the rallies, but there are a lot of participants even if it is the scale that the police officers announced
by Fermi way. Jacobs method and Fermi method exist when we calculate size of meeting. In the case of the Jacobs
method, it is calculated by dividing it into grid units per meeting area, and in the case of the Fermi
method, it is calculated by taking an average value after finding the number of persons per 1 square meter.
Currently, the calculation method of Korea is using the Fermi method.
The experiment was conducted at a distance of about 100m from Gwanghwamun Square. The distance
from Gwanghwamun Square to Gwanghwamun Square is estimated to be about 1.2Km and the distance to
the office is about 1.5Km. When calculated using the law of inverse wrist, sound of 49.4dB is transmitted
to the Blue House and 47.4dB of the office room. If the noise of the Blue House is 47dB or more, it is
not heard.