Answer to Question #140 in Acoustics for silvia

Question

Why is the sound louder and "rolling" in an empty hall rather than in the hall, filled with the audience?

Answer 1

The human body absorbs sound waves. So when there are many people in the room, there are essentially different conditions of sound spread: its reflection or reverberation (reverbation - the process of gradually reducing the intensity of sound at its multiple reflections) greatly reduces.