meg·a·phone
noun/ˈmeɡəfəʊn/
/ˈmeɡəfəʊn/
(British English also loudhailer, North American English also bullhorn)
- a device for making your voice sound louder, that is wider at one end, like a cone, and is often used at outside events
enlarge image
compare loudhailer, microphone扩音器;喇叭筒;传声筒