FWIW, "soundproofing" projects are notorious for requiring more care than one would think based on initial research. It's a big topic, but the book "Home Recor

FWIW, "soundproofing" projects are notorious for requiring more care than one would think based on initial research. It's a big topic, but the book "Home Recording Studio: Build It Like the Pros" by Rod Gervais is an excellent starting point. TL;DR: Lots of vendors will try to sell you a silver-bullet product, but no such product exists. The reality is you'll probably need to employ multiple techniques, specific to the workspace and your goals. But if you have the freedom and money to modify your working space, it can be a really fun project. It turned me from a "Let me hire someone." guy into a "Let's redo your basement!" guy. I had a blast. Also FYI: If you want to outsource this, be aware that your typical home-building contractor might not have the skills or incentives to do the project right. Typical contractors use construction methods optimized for speed and low cost. Soundproofing may require uncommon building methods, and a dedication to iterative measurements and improvements to address sources of unwanted sound.