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A 500 years old loudspeaker in Isfahan!

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Cyrus Shahmiri View Drop Down
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  Quote Cyrus Shahmiri Quote  Post ReplyReply Direct Link To This Post Topic: A 500 years old loudspeaker in Isfahan!
    Posted: 17-Feb-2010 at 06:16

It can be a good question to ask: How could someone speak to the people in the large Imam mosque of Isfahan?

It has a simple answer, there is a black square under the dome of the mosque, if you stand there and produce a sound, this sound will echo loudly seven times throughout the whole mosque, this man explains it in Persian:

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Nick1986 View Drop Down
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  Quote Nick1986 Quote  Post ReplyReply Direct Link To This Post Posted: 15-Jan-2012 at 19:22
Impressive. Before clocks were widely availably Muslims needed an effective way of being called to prayer, especially in the big cities
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  Quote eurokiller Quote  Post ReplyReply Direct Link To This Post Posted: 16-Feb-2012 at 02:18
nice acoustics 
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  Quote Cyrus Shahmiri Quote  Post ReplyReply Direct Link To This Post Posted: 10-Aug-2012 at 08:00
I just found it, a photographer sings in the mosque:
 
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  Quote Nick1986 Quote  Post ReplyReply Direct Link To This Post Posted: 10-Aug-2012 at 20:29
Impressive. It really has to be heard to be fully appreciated
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