I am looking into creating a slim good-looking noise canceling devise that one could, let's say, place on the restraunt table and cancel out most of the background chatter by a resteraunt full of loud and hungry people making a meal out a much more enjoyable and intimate experiance. Is such a devise feesable? I am not looking for headphones or anything that you wear. More like something that could be carried in your purse, then taken out and turned on at will and the person sitting across from you at the table would get the same benifets. Any imput?