"One who converses at length..." again this does not mean that you may not speak to a woman rather - you may not converse "at length" - meaning - he speaks more than is necessary for example - if they work in the same place, instead of talking about work related matters, he starts to ask her how she's doing, "how are you feeling?" etc- what business is it of yours?? she's not your wife, you're not meant to get into her personal life- and conversations like this may drag a person to places that are totally different than what he expected- even if it wasn't his intention from the beginning, but during his exchange with her- things start to develop also, the definition of the word "conversation" relates to the word "idleness" in the words of our sages-in modern hebrew , to converse is to simply talk but in the original hebrew, in the language of our sages, "conversing" at length etc conversing refers to idle chatter- conversations which nothing comes out of. "regarding hearing is says "A woman's singing is impurity." regarding hearing too- any woman who sings, that in itself has a law pertaining to impurity again- if she's his wife, there's no problem with this- but if she's not his wife? so it is written in halacha that it depends whether he knows her or not a man who hears a woman sing, if he knows what she looks like and he hears her, there's a law against this stating: 