He definitely isn't louder. If anything he's less vocal although there's not a big difference. He's never been the most talkative of cats but he can be a bit of a whiner when he thinks something (food, attention...) isn't coming as quickly as he'd like. I'm a bit more relaxed in the early mornings now if he whines for attention as he's not sprayed the wardrobe for ages so I am happy to ignore any whining and before long he's back on the bed and settling down again. I think that is having the desired result of less early morning whining. There are certain noises I know he can hear but there are also times when I approach him from behind and touch him and he jumps a bit because he didn't know I was there.