Is a man allowed to listen to a woman on the radio? Would it change if you saw the actual girl (e.g. on TV singing)? Related: What is the source for a woman's voice as ervah?
What is the source that a woman's (singing) voice is considered ervah?
Should a woman avoid singing in front of her husband while she is a niddah? Is it strictly prohibited or just inadvisable? (Obviously I am not talking about deliberately seductive songs.)