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Old 10-09-2011, 11:08 AM
 
Location: South of Maine
737 posts, read 1,039,869 times
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Quote:
Originally Posted by 6 Foot 3 View Post
Round Tuit

That was really cool to hear houdini and bess speaking . As for early recorded voices i like the 1896 campaign speech on youtube by then presidential candidate William Mckinely as i'm a diehard historian as well as interest in the sciences .
In 1969, the "Holy Grail" of Lincoln's "voice tracings" arose, however no earlier mention of this "recording" has surfaced.
Features :: Abraham Lincoln :: FirstSounds.ORG
Ask an Expert: What Did Abraham Lincoln
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Old 10-10-2011, 05:51 AM
 
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Question for some of the physicist guru's on here and that is i wonder why Edison was so adamant that DC should be the current of choice over AC (Tesla) as i assume it had to do with them both being archrivals and so just blinded pride?
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Old 10-10-2011, 04:17 PM
 
Location: South of Maine
737 posts, read 1,039,869 times
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Quote:
Originally Posted by 6 Foot 3 View Post
Question for some of the physicist guru's on here and that is i wonder why Edison was so adamant that DC should be the current of choice over AC (Tesla) as i assume it had to do with them both being archrivals and so just blinded pride?
"In 1887 direct current (DC) was king. At that time there were 121 Edison power stations scattered across the United States delivering DC electricity to its customers. But DC had a great limitation -- namely, that power plants could only send DC electricity about a mile before the electricity began to lose power. So when George Westinghouse introduced his system based on high-voltage alternating current (AC), which could carry electricity hundreds of miles with little loss of power, people naturally took notice. A "battle of the currents" ensued. In the end, Westinghouse's AC prevailed".


The American Experience | Edison's Miracle of Light | AC - DC: What's the Difference?
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Old 10-11-2011, 06:19 AM
 
13,134 posts, read 40,680,129 times
Reputation: 12304
Quote:
Originally Posted by round tuit View Post
"In 1887 direct current (DC) was king. At that time there were 121 Edison power stations scattered across the United States delivering DC electricity to its customers. But DC had a great limitation -- namely, that power plants could only send DC electricity about a mile before the electricity began to lose power. So when George Westinghouse introduced his system based on high-voltage alternating current (AC), which could carry electricity hundreds of miles with little loss of power, people naturally took notice. A "battle of the currents" ensued. In the end, Westinghouse's AC prevailed".


The American Experience | Edison's Miracle of Light | AC - DC: What's the Difference?
That explains it then !!

Lol.. cool animated schematic on the link
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Old 10-11-2011, 01:46 PM
 
Location: South of Maine
737 posts, read 1,039,869 times
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Post The "phonautograph"

"Audio historians have found a sound recording that predates Edison's phonograph by nearly 20 years. The "phonautograph" was patented in 1857 by Edouard-Leon Scott de Martinville; the device recorded images from sounds, tracing squiggles in black soot coating a surface".

The link below takes you to an NPR interview(4/4/08) with Patrick Feaster. If you click on the sound icon to the left of Listen to the story, you can hear the interview & sounds.
1860 'Phonautograph' Is Earliest Known Recording : NPR
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