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An echo is a series of sounds caused by the reflections of sound waves from a surface. For example, you can clap and it will make an echo since the sound waves would hit an object nearby, causing an echo.

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Echoes are sound waves reflected back.
They can bounce of smooth, hard objects,
the same way as a rubber ball bounces off the ground.

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An echo is a type of sound that reflects a person's voice by repeating it. To explain it clearer, let's say we are in a mountain. When you speak, your voice repeats or echoes itself because of sound waves.

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We hear echoes because when sound waves bounce off from hard surfaces around us like walls, ceilings and floors. we can also hear echoes because sound waves are reflected back.

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an echo is a sound wave that is reflected because it hit a surface then it will go back to its source.

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An echo is a sound that is repeated because sound waves are reflected back. It bounces off smooth and hard objects. In audio signal processing and acoustics, an echo is a reflection that arrives at the listener wit a delay after the direct sound.

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Echoes are a sound or a series of sounds caused by the reflection of sound waves from a surface back to the listener.

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We can hear echoes because waves are reflected back. We usually hear echoes when We are in a tunnel or in large/big places like mountains.

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Echoes can be heard in small spaces with hard walls. The distance between the sound source and the place where it is reflected from must not be less than 17m.

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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 rubber ball bounces off the ground. Echoes can be heard in small spaces with hard walls, like wells, or where there is lots of hard surfaces all around.

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Echos are sound waves that can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. We can hear echo when there is a time gap of 0.1 second in original sound and echo reflected sound.

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An Echo is a sound wave or a sound reflection that normally comes when u speak on an air tight spaces, when u speak on air tight spaces there is nowhere for the sound to go, so it reflects on the sound spoken.

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Echoes can be heard because of repeated sound waves. They can bounce off of smooth, hard objects/surfaces. That is why echoes can be heard in canyons, caves, or mountain ranges.