Answer
a) After a snowfall, it seems particularly quiet as the snow absorbs sound so there is little reflection of sound.
b) In an empty room, there is less absorption. So the reflection die out more slowly and thus the room seems hollow and echoing.
c) When people sing in the shower, sound is reflected by the walls, and standing waves are set up.This gives rise to more harmonics and hence richer sound quality.
Work Step by Step
a) After a snowfall, it seems particularly quiet as the snow absorbs sound so there is little reflection of sound.
b) In an empty room, there is less absorption. So the reflection die out more slowly and thus the room seems hollow and echoing.
c) When people sing in the shower, sound is reflected by the walls, and standing waves are set up.This gives rise to more harmonics and hence richer sound quality.
