Meaning of “Tannoy” - Learner’s Dictionary

Tannoy

noun [ no plural ] uk /ˈtænɔɪ/ UK trademark also UK/US public address system

a brand name for a system of equipment used in public places that someone speaks into in order to make their voice loud enough to be heard

(Definition of “Tannoy” from the Cambridge Learner’s Dictionary © Cambridge University Press)