Can I hear the toilet downstairs when I go to the toilet in the bathroom?

Because you're using the same sewer pipe as the upstairs, both solid and air will emit sound.

In this case, you can cover the toilet lid, close the bathroom door, and then flush the toilet, if the bathroom door is a glass sliding door, replace it with a solid wood swing door, so that you can have better sound insulation.

It should be that the main sewer pipe is connected to the floor drain, and there is no consequence of using a trap, or it may be that the landlord's toilet does not have a trap, you can check the reason and then take measures. I hope my answer can help you.

When I was a child, my mother was changing diapers and dressing. It may be a good thing that a child in his or her period understands the difference between sex.

Calling the police is to consider the cost performance, after calling the police, you may have to follow the police station to make a record, you can't go for a long time, during which your family or friends are likely to be anxious to find you, you don't tell them about this is also a problem, don't tell it, it's not good to explain where you went, tell it to you This ugly thing may make everyone know, you can't go for a long time, and it will delay your business. Therefore, this kind of trivial matter that does not hurt or itch, it seems that it is not very cost-effective to call the police.