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en.wikipedia.org/wiki/Echo

In audio signal processing and acoustics, echo is a reflection of sound that arrives at the ... Acoustic waves akola are reflected by walls or other hard surfaces, such as mountains and privacy fences. The reason of reflection may be explained as ...

www.physicsclassroom.com/mmedia/waves/er.cfm

If you have ever been inside of a large canyon, you have likely observed an echo resulting from the reflection of sound waves off the canyon walls. Suppose you ...

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

An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a ...

physics.tutorvista.com/waves/sound-reflection.html

So, now we discuss the process of sound waves, its reflection, echo sound, and reason for reverberation. It is behaving as wave which produce by vibration in an  ...

www.school-for-champions.com/science/sound_echoes.htm

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 ...

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 ...

.ask.com/youtube?q=Sound+Waves+Echo&v=BYiCzWZ8cBs
Sep 25, 2008 ... Nice introduction to sound waves through echoes and explaining how some animals rely on sound echoes to find their prey...

www.physchem.co.za/OB11-wav/sound2.htm

Reflection of sound waves. If a source of sound is directed at a vertical surface some distance away, an ECHO may be heard. Sound waves "bounce" off the ...

www.bbc.co.uk/education/guides/z8d2mp3/revision

Sound waves are longitudinal waves that must pass through a medium, such as air. Echoes are reflections of sounds. The frequency of ultrasound is above 20 ...

.ask.com/youtube?q=Sound+Waves+Echo&v=GkNJvZINSEY
Jun 20, 2012 ... This Eureka.in Physics video shows how sound travels through the various ... in the traveling of sound energy and the various type of sound waves. It also discusses about the measurement of sound and the concept of echo.