The sound created in a big hall persists because of the repeated reflections. The phenomenon is called

What is the phenomenon where sound waves bounce off a surface called?

What is the name of the phenomenon where a sound wave changes direction as it passes through a medium?

When the same tone is played on a sitar and a fute, the sound produced can be distinguished from each other because of the diference in :

What is the name of the phenomenon where a sound wave spreads out as it passes through an opening?

Reverberation is a phenomenon associated with a