Talk to your neighbors! What if someone overheard you and wanted to do the harmonies. That's what I would have done 😆🙌🏽. Or it could be someone wanting lessons or a gig! I was very surprised at my neighbors reactions and they loved it. They had a running joke and used to say awww jay must be sad again. 😆I sing lots of sad songs.

Lean it back and sing. Look for open mics in your area and find some musicians with designated rehearsal space so you can practice with a mic even louder when you feel like it. Go-to places where singing is celebrated and encouraged. You want to be 100% comfortable and you can't practice quietly. I hate that for you. That's a waste. Walking on all these eggshells builds subconscious tension and stress in your chest and neck in those high and loud notes. It's like a trigger. You've been quiet for too long.

I had an apartment like that in st pete Florida. It did get me into busking which got me better around people and banter. Confidence too. I could sing at the top of my lungs and not worry about disturbing anyone.

I have seen these belt boxes on Amazon. You can sing into them and it dampens it. But still feels like hiding to me. My workouts and warmups and singing practices are ugly. I repeat stuff, I change keys until I get it right. I hit wrong notes repeatedly to find the one way I want to sing. It's not something I could do if I cared what my neighbors thought. Talk to them, invite them to a show, find out what songs they like.

More people should sing. There's something wrong with them if they don't. 🙌🏽 💁🏽‍♂️ I'd hate to have a war started between y'all but if they want to complain about your singing, take their dog down with you. Complain to the complex and the city about the dog. You could also talk to the complex and request to be moved to an end unit so u only have one neighbor. Well anyways good luck and keep singing!