the echo wall

the echo wall

The echo wall is the wall of the imperial vault. The wall is 3.72 meters high, 0.9 meters thick, 61.5 meters in diameter and 193.2 meters in circumference. The walls are made of brick and mortar, and are covered with blue glazed tiles. The arc of the wall is very regular, the wall is extremely smooth and tidy, and the reflection of sound waves is very regular. As long as two people stand behind the East and West halls and stick to the wall, and one person talks to the North against the wall, the sound waves will continue to reflect along the wall and reach the other end of one or two hundred meters. No matter how small the voice is, it can also make the other party hear clearly. Moreover, the sound is long, which can be called funny, creating a mysterious atmosphere of "heaven man interaction". So it is called "echo wall".

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Panorama

Construction time

1530 A.D

The ninth year of emperor Shizong of Ming Dynasty

The year of the tiger

appearance

Echo wall is the wall of the imperial dome of the temple of heaven in Beijing. It is 3.72 meters high, 0.9 meters thick, 61.5 meters in diameter and 193.2 meters in circumference. There are three buildings in the wall, one of which is called huangqiong, and the whole wall is neat and smooth.

characteristic

The echo wall has the effect of echo. If one person stands under the wall of the east side hall and speaks softly towards the north wall, while the other person stands under the wall of the west side hall and speaks softly towards the north wall, two people put their ears close to the wall, and they can clearly hear each other's voice at the other end, and the echo of the voice is long.

Echo principle

The reason why the echo wall has the echo effect is that the construction of the wall of the imperial vault coincides with the sound transmission principle of acoustics. The wall is made of brick and mortar. It is smooth and smooth, with accurate circumference, which is conducive to the regular reflection of sound waves. In addition, the upper end of the wall is covered with glazed tiles, so that the sound waves will not disappear dispersedly, which also causes the echo effect of the echo wall.

Traffic information

From the south gate into the temple of heaven, to the north after the round hill is. From the north gate into the temple of heaven, to the south.

Address: Tiantan Park, Dongcheng District, Beijing

Longitude: 116.413128

Latitude: 39.878413