In the ongoing cultural debate over what and who should be commemorated in public monuments, some new voices will join the conversation in Miami Beach come March. There, a sound shower of maternal affirmations, reminders and loving (or scolding) critiques, spoken by a chorus of women in English, Spanish and Creole, will pour out from a configuration of speakers mounted on a plinth and encased in radiant multi-toned glass in Collins Park, in front of the Bass Museum.