system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How megaphones work.
gpt
**When one shouts , the sound waves disperse in a semicircle , the power of the voice cords distributed to 180 degrees. A simple megaphone channels the sound in a small angle and thus is directional and stronger. Electric megaphones amplify the sound and still send it in a narrow cone**