"llamar por megafonía" in English

to call in- to call up- to name- to phone- to term- to call off- to call out- to call for- to get- to get around- to get in- to get out- to hail- to knock- to knock up- to phone in- to phone up- to recall- to recall- to ring- to ring- to ring back- to ring in- to style- to summon- to call around- to call- to draw- to appeal- to ring the doorbell- to telephone

by- for- because of- through- via- for the sake of- per- of- out of- over- to- from- times- afterafter

a- the

public address system- PA system- public-address system