1
general::
noun LOUDSPEAKER + VERB broadcast sth Loudspeakers broadcast the football results. LOUDSPEAKER + NOUN announcement | system PREP. from a/the ~ Christmas songs blared from loudspeakers. | over a/the ~ We heard the news over the loudspeaker. | through a/the ~ A woman was addressing the crowd through a loudspeaker.
Oxford Collocations Dictionary