
From what you say, that doesnt sound an unreasonable amount of noise at all.
However, neighbours are a funny species, i used to have horrible ones, who wound my dogs up, so that they could then complain about the noise (i moved! they did other stuff too!), now, i live on a noisy council estate, and my neighbours are great, my dogs bark when someone comes to the door, walks past the front window (which im trying to stop, cos it annoys me!) and if anyone is in my back garden.
Try talking to your neighbours about the problem, be reasonable, and hopefully they will too. I have found some ppl just expect absolute silence at all time, apart from the noise they make themselves, which is basically impossible unless u live in the middle of nowhere!
Em