consequently, an observer standing at half that distance from the reflecting object would hear the echo a second later than the sound. Such an echo would repeat as many words and syllables as could be heard in a second. As the distance decr...
http://chestofbooks.com/reference/Wonder-Book-Of-Knowle...
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Grand Canyon question: What causes the echo in the grand canyon? lots of space . Here are the conditions necessary for an echo: 1. Sound must travel at least 75 meters 2. The sound must be able to bounce ... Discuss the question "What causes the echo in the grand canyon?"
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wiki.answers.com/Q/What_causes_the_echo_in_the_grand_ca...
wiki.answers.com/Q/What_causes_the_echo_in_the_grand_canyon
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Echos are caused by sound waves bouncing off walls or objects
http://wiki.answers.com/Q/What_causes_an_echo
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The sensation of sound persists in our brain for 0.1 sec. To hear the distinct echo the time interval between the original sound & the reflected one must be at least 0.1 second. If we take the speed of sound as 344m/sec (at 22 deg cel),...
http://www.answerbag.com/q_view/702156
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What causes echo on phone calls and similar? Electricity travels at the speed of light. so it can't be anything to do with distance. It's on some phone calls and Internet calls but not others. ... re: What causes echo?
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www.pcuser.com.au/pcuser/hs2.nsf/web/28776CC31050C9FDCA...
www.pcuser.com.au/pcuser/hs2.nsf/web/28776CC31050C9FDCA256EC2000A0EBC
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It's important to fully understand the causes of this effect, before you can take measures to eliminate it. This page attempts to explain clearly where echo comes from. Only once you've read and understood the explanation given here should you consider Asterisk echo cancellation.
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www.voip-info.org/wiki/view/Causes+of+Echo
www.voip-info.org/wiki/view/Causes+of+Echo
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Echo is caused by crosstalk between the pixel being read out and the one being reset, when operated at high frame rates. ... Changing integration time changes the apparent position of the echo because a different pixel is reset at the time the same pixel is read out...
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eo1.gsfc.nasa.gov/overview/RTR/Sec-11-Hyperion/tsld082....
eo1.gsfc.nasa.gov/overview/RTR/Sec-11-Hyperion/tsld082.htm
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There are several causes of echo in an Asterisk installation. First to check is your PSTN card, particularly whether its loadzone is correctly set. For instance, if your PSTN card is set to FCC (standard for US), but you’re in a UK line, then you are likely to experience harsh echo.
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www.asteriskblog.com/causes-of-echo-in-asterisk-and-tel...
www.asteriskblog.com/causes-of-echo-in-asterisk-and-telephony-in-general/
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If sound waves hit a solid wall, they will bounce off the wall and you will hear an echo. If you were to blow a trumpet in an area that causes an echo, then each time you blew your trumpet, your ears would hear it twice.
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www.light-science.com/echosound.html
www.light-science.com/echosound.html
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