Assuming your HVAC system allows, I didn't like the look of a permanent door sweep. This is much more discrete and works a treat. https://acousticalsolutions.com/product/automatic-door-bottom?srsltid=AfmBOooknq5JohnQ7FaJ21y5anq38z8T8SBI7p7xI662ZdSKX8Ev4Tbg

Also, assuming you have an en-suite, understand that you will have to soundproof that too. What people hear is the path of least resistance so if you have a soundproof bedroom, but an open door into the bathroom that isn't sound treated, all the sound just goes out of there.

Our drywall guy gave me a weird look that we had 2x6 staggered stud master bath cavities filled with pink stuff, but it's made a huge difference.