How does a horn amplify sound?

A horn amplifies sound by converting the energy from a vibrating source, like a vocal cord or instrument, into a larger volume of air movement. Its shape, typically flared or conical, helps to efficiently direct and project sound waves outward, increasing their reach and intensity. The horn's design enhances the resonance of the sound, allowing it to travel further and be perceived louder by the listener. This amplification occurs without altering the pitch of the sound produced.