Loudhailer, Cone to Amplify One's Voice
This page is the CodyCross answer for the clue below from Train Travel, Group 703, Puzzle 4 (Double Decker).
Question is: Loudhailer, Cone to Amplify One's Voice
and the answer is: MEGAPHONE
Word Meaning:
MEGAPHONE — A portable, usually hand-held, funnel-shaped device that is used to amplify a person’s natural voice toward a targeted direction.
Definitions from Wiktionary.