I was a trumpet player for years in high school and college, practiced all the time at home and so did my brother so I experienced the situation from both sides. My opinion now is that it is irresponsible to make playing an instrument your hobby or profession (an instrument that can't avoid making noise that will bother others) unless you have access to an appropriate practice space. There are churches, music schools, music stores that will rent out space. Yes it sucks but that's the breaks. Either make sure you have access or don't pick up that trumpet/violin/tuba. Or switch it out for a keyboard (which can be electronic and practiced with earphones in) or guitar. This is what I did in my young adult years after I had put down the trumpet and was playing piano as a hobby while living on my own in an apartment.
Trumpet fortunately is one of the few instruments that you can reasonably practice with a practice mute. I have the Up Mute and it works amazingly with only a little backpressure, no complaints from any neighbors. Woodwinds are much more difficult to keep quiet though.
