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Singing activity of the students come from outside the building on the right side, but the building's users will often hear such singing coming from the left. This is because the left hand side there are school buildings. When singing outside travel to affect the school building, which is a cement building that sound travels so much cement walls reflect back into the building where researchers working on the building, so users often confused that sounds, travelling.From the opposite direction the sound source and the last one? If in the middle of the open space in the middle of buildings at night maybe hears the sound that feels like coming from different layers. In spite of not having people on Note that, because the surrounding window. If any one of the panes, window open, leave it in the night. The sound from the outside, the inside and in the split gesture area, which will sound and echo building, until the people in this area may mistakenly believe that there are people in the building at night.
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