Megaphone and Horn Speaker

Both tags seem to be applied to the same thing, horn speaker looks like a sub-set of megaphones with an emphasis on the "electronic" aspect, megaphone's wiki even mentions that it can also be used for electronic ones. If we don't want an alias we could at least implicate, and give their wikis a rewrite.

A megaphone is a hand-held device designed to be spoken into, which by definition excludes pole-mounted speakers that receive a remote signal: post #2534722, post #5280366, etc. There is some overlap between the tags but horn_speaker definitely isn't just a subset. It occupies its own unique niche that includes parts of both the megaphone and public_address_system tags.

Got it, basically megaphone, horn speaker and public address system overlap in a way that can't be resolved by implications. It'd be great if someone can update their wikis to clear out when to use the three tags respectively as I don't want to accidentally pollute them.