Can Someone Explain How Horns Make The Music Sound Louder?

[tim w]

You could liken it to a projector lens. Without it, the light / sound would escape & scatter immediately. With it in place, it concentrates & projects the signal to a point & into the room.

[Curt A]

A wood instrument like a violin, works the same way to increase the sound acoustically by using the hollow body to project and increase the sound generated by the strings and traveling through the bridge to the body. Without the hollow body a violin would make very little sound...