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