What is another word for tannoy?
Pronunciation: [tˈanɔ͡ɪ] (IPA) 
Tannoy is a trademarked name for a British loudspeaker system used for public address announcements. When referring to similar systems, there are several synonyms that can be used. The most common is "PA system," short for public address system. However, other synonyms can include "loudspeaker system," "announcement system," or "speaker system". Another possible synonym is "intercom system," although it is more commonly used for communication within a building rather than public announcements. Finally, "sound reinforcement system" could be used for larger-scale applications where amplification is required for live music or events.
