loudspeaker
noun [ C ] uk/ˌlaʊdˈspiː.kər/ us/ˈlaʊdˌspiː.kɚ/
扩音器，广播喇叭
a piece of equipment that changes electrical signals into sounds, especially used in public places so that large numbers of people can hear someone speaking or music playing
Music blared from loudspeakers. 广播喇叭里响起音乐声。
See also: speaker (ELECTRICAL)