How Does an Echo Work?

Answer

An echo is generated when sound from a source bounces off a hard material like a wall, multiple times. The sound needs to travel for a long distance for the echo to be audible, prolonged and loud. The bouncing replays the sound that is heard as an echo.
Q&A Related to "How Does an Echo Work"
For those of use that have never been in a submarine you may ask how does a submarine work in the depts. of the water. There is a rudder that can be turned right or left for steering
http://www.ask.com/web-answers/Society/Military/ho...
Electromagnets work by creating magnetic fields using electrity. If you own a microphone or speaker, you've been using electromagnetic technology already! You can find more information
http://www.ask.com/web-answers/Science/Physics/how...
A siphon is basically a hose of some kind that is used to take liquid from one and transfer it to another, in fact some people use a garden hose to siphon things.
http://www.ask.com/web-answers/Business/Other/how_...
A greenhouse works by taking in sunlight. The greenhouse heats up from the sunlight. The purpose is the conversion of sunlight into heat.
http://www.ask.com/web-answers/Science/Other/how_d...
2 Additional Answers
If you scream or yell while you're outside, you might hear your voice a few times before it suddenly stops. What's happening is the sound waves you make are bouncing off of objects, like walls, and return back to your ear so you hear them again. When the sound waves lose their energy, you stop hearing the echo.
This is one of the simplest examples of how sound waves work. When something, say a person, makes a loud noise, that noise bounces off objects and returns back to where it came from. The closer the object, the louder the echo. Once the sound wave has spent all its energy, you cannot hear the echo anymore.
Explore this Topic
Ultrasonic sensors are commonly used in robotics. It works when a pulse is emitted from a sensor. When the pulse bounces off from an object, an echo returns. ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014 Ask.com