Because there is nothing to 'absorb' the sound, echo's are basically a sound reflected by it hitting a surface, if you walked into a house with nothing in it, just the walls, floorboards or concrete floor and ceilings then the sound echos because there are no soft things or cushiony things to absorb the sound and stop it reflecting.
No they most definitely do not absorb sound
Cotton absorb sound because it has small area that sound penetrate and doesn't reflect .
Sound travels through all matter but some materials either absorb sound, reflect sound, or just slow sound down.
it absorbs sound well
Because there is nothing to 'absorb' the sound, echo's are basically a sound reflected by it hitting a surface, if you walked into a house with nothing in it, just the walls, floorboards or concrete floor and ceilings then the sound echos because there are no soft things or cushiony things to absorb the sound and stop it reflecting.
No they most definitely do not absorb sound
well sound is adsorbed by dence fabrics like carpet, yet wood amplifies sound (by a small margin). rugs, bed linin, blankets..... things like that.
No, concrete does not absorb sound as it very dense.
well the weird things in your things have some sort of things which help the other things to ,maybe help absorb the water things. Amen.
reverberants
Cotton absorb sound because it has small area that sound penetrate and doesn't reflect .
Sound travels through all matter but some materials either absorb sound, reflect sound, or just slow sound down.
it absorbs sound well
Light does not absorb things. Light can be absorbed by things.
no
Some surfaces reflect sound well, others don't.