Tag: clap

Golkonda, India

Guides will demonstrate the clapping telephone, which was used to signal over long distances in this ancient city.

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This is the ruined city of the Kingdom of Golkonda (c. 1364–1512) which has several curious acoustic features including what has been described as an “amazing clapping telephone”. Clap near the entrance, and sound is reflected by a nearby building so that it can be heard a kilometer away at the highest point of the city, at the Bala Hisar pavilion. Some other quirk of this “magical acoustic system” means that close to the person clapping, the sound can only be heard within a few metres.

Demonstrating the clapping telephone. Lynn Robert Carter commented that the sound is more remarkable than appears on this video.
There’s also an interesting flutter echo as well

Logistics

11 km west of the city of Hyderabad, Andhra Pradesh state, south-central India. Suggested website for more information.

Credits

  1. Photo: mikecogh (c) some rights reserved