Photos from open sources of
In the world you can find many amazing places that are on the first look is given by real mysticism, but in fact turn out to be a kind of “miracles of physics”: not at all supernatural, but still incredibly interesting.
One such place is the dam on the South Parra River in the Australian Barbarossa Valley in the south of the country. It is concrete a structure the height of a ten-story house was erected here from 1899 to 1902 years. The dam closes a huge reservoir, the water from which arrives in several Australian areas.
For its unique acoustic properties, the dam was named in common people “whispering.” Like many other dams, she It is a curved hard surface. However, from hundreds of other dams it differs in that any sound is free “travels” from one end of the structure to the other. In other words, two people can easily talk while on opposite ends of the dam, one hundred and forty meters apart friend.
A photo from open sources
To do this, you and your interlocutor do not even need to raise voice, as the impression will be created that it stands completely near you, but not visible in the distance with a barely distinguishable point. Amazing, isn’t it? By including the following video recording, you can see and hear this trick yourself doing two tourists.
Voices, footsteps and even someone else’s breath are heard so clearly here because of the so-called parabolic effect: the side surface of the dam perfectly flat, that is, by and large is one sector circle. Sound waves ricochet from the wall several times, flying in the result from one end to the other.
According to urban legend, the unusual properties of a concrete wall were discovered during the construction of the dam. If you believe this myth, hired workers were discussing at one end of the dam of their boss, without stinting on strong buzzwords. Head going up to the opposite side of the wall, was extremely surprised when I heard such reviews about your person. Needless to say, after this incident, he fired these subordinates and hired others, less chatty.
Australia
