Ключевые слова: allowed, be quiet, be silent, calm, communication, ed, emoticon, face, finger, forbid, forbidden, hand, icon, keep calm, keep quiet, keep silence, keep silent, lady, line, man, mobile, mouth, mute, no, no sound, no talking, people, please, prohibited, prohibition, quiet please, set, shh, sign, silence, silent, silent please, silhouette, smile, smiley, sound, sound off, speaker, symbol, talking, warning, whisper, woman,