New neighbors seem crazy!

I’ve lived in my house for 4 years. I’m 28 and I live alone with my doggos. I have a really good relationship with my landlord. He’s super cool and just a great landlord and I really value my home. Anyways, he owns both my house and the house next door that I share a fence with. Well I got new neighbors about two weeks ago and today they knocked on my door to complain that I am talking too much and too loud. They said they don’t appreciate hearing me curse. Before these people moved in my landlord lived there and I have never had any complaints. I’m a very quiet person! I live alone and rarely have visitors except for my toddler niece and nephew. I am offended. Also we do not live in an apartment so I don’t plan on tip toeing around my own home and I know there’s no way they hear me talking. I rarely even curse! I just told them it was nice to meet them and that I am very quiet and they must be hearing someone else and they said no it’s me and they don’t want to have to report to the landlord. Tf??

The only thing I think they can MAYBE hear is my 1 year old nephew crying because he has Covid right now so he’s super sick and I’m caring for him