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In audio signal processing and acoustics, echo is a reflection of sound that arrives at the listener with a delay after the direct sound. The delay is proportional to ...

How does an echo occur? | Reference.com


An echo occurs when a sound wave reflects back towards its source after hitting ... one continuous sound rather than the separate sounds that make up an echo.

Echo - How Radar Works | HowStuffWorks


Echo - Echoes and Doppler shift are two effects that are key to understanding radar. Learn about echoes, Doppler shift and sonic booms.

What Makes an Echo? @ Super Beefy


Jul 25, 2014 ... When you make a sound, sound waves travel through the air. You first hear that ... If only one obstacle reflects the sound, you'll hear only one echo, a simple echo . ... What happens when two oceanic plates collide? What are ...

Echoes, Sound, Science, Science Tutoring | Tutorvista.com


Ordinarily echo is not heard as the reflected sound gets merged with the ... from a wall and sets up a simple pendulum which makes three vibrations per second.

Causes of Echo - voip-info.org

www.voip-info.org/wiki/view/Causes of Echo

Dec 29, 2015 ... Causes of echoIn Brief:Its most likely your echo is caused by the far-end ... So look what happens if the hybrid in the PSTN-VoIP gateway is ...

www.ask.com/youtube?q=Makes an Echo Happen&v=BYiCzWZ8cBs
Sep 25, 2008 ... Nice introduction to sound waves through echoes and explaining how some ... Islam makes life beautiful and wonderful I have found that ...

experimental physics - Why can't echoes be heard inside a room ...


Jan 6, 2012 ... Why when I shout in my room I do not hear any echoes? .... or other details, but to hear echo you need to make the 'click' and pay attention. ... If you happen to move all furniture and curtains out of a room the difference in ...

Duck Quack Echo | Acoustics, Audio and Video | University of ...


So what is an echo, and does it happen to a duck's quack? ... Another common place to hear echoes is in some railway stations, making announcements hard to  ...

Reflection of Sound - NDE/NDT Resource Center


What happens when a sound wave hits a concave shaped surface? ... Echoes are the sound of your own voice reflecting back to your ears. ... waves overlap and interfere with each other and the original waves, making the sound less clear .

More Info

What Causes An Echo? - Chest of Books


An echo is caused by the reflection of sound waves at some moderately even surface, such as the wall of a building. The waves of sound on meeting the surface ...

Reflection: Echo vs. Reverberation - The Physics Classroom


Echo vs. Reverberation. Sound is a mechanical wave which travels through a ... of mechanical energy through a medium by particle interaction is what makes a ... This echo results from the reflection of sound off the distant canyon walls and its ...

Sound Echoes by Ron Kurtus - Succeed in Understanding Physics ...


Sound Echoes. by Ron Kurtus (revised 9 November 2005). An echo is the sound you hear when you make a noise and the sound wave reflects off a distant ...