vintage poster with red retro megaphone yellow halftone background |
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| navigate by keyword : advertisement alert announce announcement audio background broadcasting bullhorn business cartoon cheers communicate communication concept control design halftone horn icon illustration lightning logo loud loudspeaker megaphone message microphone music object poster power promotion propaganda protest public retro revolution scream shouting sign sound speak speaker speech symbol vintage voice volume warning |
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| vintage poster with red retro megaphone. Megaphone on yellow halftone background. |
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