EDINBURGH, Scotland - A Scottish college student said her invention, a clear plastic helmet with openings at the face and ears, is designed to help people talk in noisy bars. Elaine McLuskey, 23, an Edinburgh Napier University student, said the sound bubble is designed to cut out background noise and help friends converse without straining in busy bars and pubs, the New York Daily News reported Thursday. "(There's) that frustrating situation of trying to catch up with a friend in a busy bar. You want to hear their news and have a proper chat, but you have to shout over...