Question

sound absorbing materials and sound reflecting materials.

Answer 1

is called lustrus and sonorans

Answer 2

$\underline{\bold{Sound\: absorbing\: materials}}$

The materials which absorb the sound when it is reflected add on the surface of those material are known as sound absorbing materials.

These sound absorbing materials change the sound waves energy into the heat energy.

It helps to satisfy the law that energy can never be created nor be destroyed it can be changed from one state to another.

Therefore, here sound energy change into the heat energy.

Acoustic foam is the example of sound absorbing materials.

$\underline{\bold{Sound\: reflecting\: materials}}$

The materials which are not able to absorb the sound or or they just reflect the sound waves from their surface are known as sound reflecting materials. It can also be said as the bouncing back of light by striking the surface of an object and it is named as echo.