How do we know this?
Because the notes from a band of music come to us in the order in which they are played, whether they are loud or faint.
Reflection of Sound.
What becomes of the waves of sound when they strike a solid substance?
They are thrown back, as light from a looking-glass, or a ball from a stone wall.
What is this called?
It is called reflection of sound.
In what direction is sound reflected?
Sound, like light, is reflected so that the angles of incidence and reflection are always equal.
When the reflected sound comes back to the ear, what does it make?