megaphone
noun [ C ] uk/ˈmeɡ.ə.fəʊn/ us/ˈmeɡ.ə.foʊn/ (UK also loudhailer)
喇叭，话筒，扩音器
a cone-shaped device that makes your voice louder when you speak into it, so that people can hear you although they are not near to you
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。