This page contains polls dedicated to What is an echo?.
If you want to create a poll please feel free to do it by clicking on "Create a Poll" button.
Like light, sound can be reflected from certain surfaces. Hard surfaces such as rock or the side of a building reflect sound well; as the sound bounces back you hear an echo. The delay in hearing the echo is due to the comparatively slow speed of sound.
Soft materials absorb sound and will not produce an echo. This is why recording studios are lined with felt material, which prevents any unwanted noise from interfering with the recording.
Concorde was the only supersonic airliner in comme
read more...
Tags: sound
Note: All polls have to be approved by the editorial team of FamousWhy before they can appear live on FamousWhy.com.