And lastly, we'll talk about things that you're not allowed to do in your own home because you may cause damage to your neighbor's property. The Mishnah says that a person is not allowed to open a bakery or a dyer's shop, where things would be dyed, in a room he owns beneath his friend's storeroom. In that storeroom, there was oil and grain. The smoke from the dyer and the bakery could damage the grain and the oil, so you're not allowed to do that. You're also not allowed to have a stable of animals below grain and oil, because the odor from the animals would damage the grain above it. In truth, whenever we say that, it means there's no machloket (dispute). When it comes to a bakery or a dyer's shop, if the storehouse on top was holding wine, that would be no problem because wine is not negatively affected by heat or smoke. But you're not allowed to put an animal stable there, because the stable would still affect the wine above it.
We'll now talk in the Mishnah about doing things on your own property that are not allowed because you want to make sure your neighbor gets proper sleep. If a person opens a store in the courtyard, a common area shared by multiple people or homes, the people who live there—the neighbors—are able to be mocheh. They're able to protest. They can tell the owner of the store that they're unable to sleep because of all the people coming in and going out of the store. That area makes a lot of noise and they're unable to sleep. So they could protest.
A person is allowed to make utensils in his courtyard and then go sell them in the marketplace. The neighbors can't protest and tell him, “I can't sleep because of all the noise of the hammer.” They can't make this claim because using the courtyard for your normal daily use, which is making materials and making instruments, would not be a problem. That's a normal use of a courtyard. Of course, on the other hand, selling out of your courtyard becomes a problem, like we saw above. So they could protest only at the selling, but not in terms of crafting. Your neighbor cannot protest and say that he can't sleep because of the noise of the millstone grinding up the different kernels in a person's courtyard. He's not allowed to protest about that either. A neighbor is not allowed to complain about the noise of children, of babies. What a beautiful sound Jewish babies make! If he is teaching them Torah in the courtyard, he's not allowed to protest. That is all expected and necessary in the normal use of the courtyard.