also: メガフォン
megaphone; bullhorn; loudhailer
A handheld cone-shaped device for amplifying the voice, used in sports events, demonstrations, or by tour guides.
The teacher used a megaphone to give instructions to the students.
The demonstrators chanted slogans through megaphones.
He directed a feature film for the first time.
The coach shouted instructions to the players through a megaphone.
The cheering squad cheered while holding megaphones.