Ключевые слова: action, advertising, amplification, announcement, announcement device, attention, audio, awareness, awareness raising, bold color, classic design, communication, creativity, demonstration, design, equipment, event, expression, feedback, focus, gathering, group, hand, handheld, individuality, influence, loud, loudspeaker, megaphone, message, minimalism, motivation, orange background, protest, public speaking, rally, retro style, signal, social media, sound, sounds, speech, statement, tactile object, technology, urban, vintage, voice,