Ключевые слова: adult, analysis, audio tool, black, closeup, communication tool, concern, confusion, consideration, contemplation, doubt, expression, eyeglasses, eyewear, face, facial hair, focus, frown, glasses, handsome, head, headphones, headset, human, listening, listening device, male, man, one person, portrait, puzzled, puzzled expression, review, scrutiny, study, technology, thoughtful, uncertainty,