What would a guy think if a girl told him his voice is hot.?

I do not know this guy very well but I think we have been admiring each other from afar. One day at school when I overheard another girl talking to him about getting together sometime I just came out and told them that yeah he has a hot voice. He said he had never heard that before. I have seen him since and I cant tell exactly what he is thinking. I think he is like 20 and I am 27 so there is a age difference.