In anticipation of the Tundra DLC I started a tundra zoo. To keep my guest from freezing (why don't they wear a coat when visiting a zoo in Iceland?) I put heaters on the path. So far so good, but the heaters make an incredibly loud and annoying buzzing noise as soon as you get even a little close to them. Can the noise level be lowered (or give us an option to turn it off) please?