Is he part siamese by any chance? I have two that are part siamese and love to talk. Has he just started it, because if he just started it and if he does it during the day at all(cause you don't want this at night lmbo) you could try putting pebbles or pennies in a can when he yeowls if you are close shake it and tell him quiet or no. If he is a ways away, toss the can in his general direction (not at him lol). It worked for my one cat and my other cat talks at more appropriate times that isn't so disturbing. Hope this may helps. The main thing is to make sure that he is not reminding you that it is dinner time when you toss the can. Use it when he is just being a pain. Mine would wonder around the house for absolutely no reason meowing.