Web Results

en.wikipedia.org/wiki/Echo

In audio signal processing and acoustics, echo is a reflection of sound that arrives at the ... The reason of reflection may be explained as a discontinuity in the propagation medium. This can be heard when the reflection returns with sufficient ...

www.dictionary.com/browse/echo

Echo definition, a repetition of sound produced by the reflection of sound waves from a wall, mountain, or other ... The American Heritage® Science Dictionary

www.gcsescience.com/pwav11.htm

Echo and Reverberation - Reflected Sound Waves.

science.howstuffworks.com/radar1.htm

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

www.reference.com/science/echoes-created-fafd0d1c0acfcadf

Echoes work through the reflection of sound waves. When a person shouts into a well or canyon, and they hear an echo, it is because the sound waves reflect from the ... science.howstuffworks.com ... What is the definition of light waves? Q: ...

www.dkfindout.com/us/science/sound/echoes

Improve your knowledge on what an echo is and find out more about sound with DK Find Out for kids. ... Science · AW 187527 OUTERPLANETS PeterBull 2 ... An echo is a sound that is repeated because the sound waves are reflected back.

www.tutorvista.com/content/science/science-i/sound/echoes.php

As a result of reflection of sound wave from a large obstacle, the sound is heard which is named as an echo. Ordinarily echo is not heard as the reflected sound ...

www.cnet.com/news/appliance-science-alexa-how-does-alexa-work-the-science-of-amazons-echo

Aug 4, 2016 ... The Amazon Echo listens to you, translating your voice into commands so it can play music, turn the lights on, or order stuff from Amazon.

kids.britannica.com/students/article/echo/274115

This was the poetical Greek explanation of an echo. The scientific explanation is that sound waves are reflected from flat surfaces. An irregular surface breaks up ...

science-at-home.org/kid-questions-echoes

Apr 30, 2012 ... Little girl found a tunnel that echoes. An echo is like throwing a ball – if there are lots of hard walls the sound will bounce back.