点评:On the surface, it appears to be nothing more than a massive, concrete dam built to hold back the deep waters, but those who know its mystery understand it is actually a clandestine acoustic conduit. Because of its flawless, semicircular design, a hidden pathway is formed where sound travels completely uninterrupted along the inner curve. If you stand at one side of the structure and softly utter a phrase, your words will bypass the open air and journey unseen to the opposite end, more than 140 meters away.
To experience this phenomenon, two accomplices must separate and take up positions at the exact, opposite flanks of the stone wall. When you press your face toward the concrete and speak in a low, quiet murmur, your voice is captured by the wall's curves and carried securely across the vast gap. To an outsider standing in the middle, the air remains perfectly silent, completely unaware that a secret message is flowing right past them. It behaves like a physical, open-air confessional where private thoughts are delivered straight into the ear of a distant listener, proving that some walls do not block communication—they whisper it.
翻译:乍一看,它只不过是一座用于拦截深层水流的巨大混凝土坝体罢了。但知晓其奥秘的人则明白:它实际上是一条隐秘的声学通道。由于其完美的半圆形结构,内部形成了一条笔直的通道,声音便能沿着这条通道毫无阻碍地传播。如果你站在坝体的一侧轻声说出一句话,声音便会绕过空气传播,悄无声息地抵达另一侧。距离在140米以上。
要体验这一现象,需要两个人分别站在石墙两侧的正对面位置。当你把脸贴近墙面,用低声细语的方式说话时,你的声音会被墙面的弧度所捕捉,并稳稳地传送到对面。而对于站在中间的人而言,周围却一片寂静,他们根本察觉不到有秘密信息正从身旁传过去。这种现象就如同某种物理现象一般。一个露天的“忏悔室”——人们在这里将内心的秘密直接倾诉给远方的倾听者,从而证明:有些墙壁非但不能阻隔交流,反而会让话语悄然传递。