Question

can you predict a dark room is empty or not with the help of sound? how?
please help me ।
50 points​

Answer 1

Answer:

Sound waves can reflect off surfaces. We hear sound reflections as echoes. Hard, smooth surfaces are particularly good at reflecting sound. This is why empty rooms produce lots of echoes.

Soft, rough surfaces are good at absorbing sound. This is why rooms with carpets and curtains do not usually produce lots of echoes.

Explanation:

With this information, you'd be able to come up with your answer,

Hope this helps!

Answer 2

yea, by sound enegy example if uh speak a your sound knock on the object and react to your ears