> We don’t have a decibel meter
Are you from the same team as OP? If you don't have a meter how do you know if you've changed anything? I agree 3 dB is a big difference, but 110 is so loud to begin with I don't think you'd be able to tell the difference. How do you know you're at 113 to begin with? I'm really not trying to be mean but if you don't have a meter, what are you even testing?
edit: you can get a pretty cheap one on amazon. It's not expensive and fancy, but it will at least give you some numbers