Where does “altavó” come from?

altavó (Fala) comes from Spanish altavoz, from Spanish voz, from Old Spanish voz, from Latin vōx, from Proto-Italic wōks, from Proto-Indo-European wṓkʷs, from Proto-Indo-European wekʷ- — to speak, to sound out.

altavó (Fala): loudspeaker, speaker