My new soundproof booth has passed all road tests with flying colors! I’ve narrated one book in there so far with beautiful results, and I love having both my commercial and my audiobook mics set up so that I can switch back and forth during the day as needed.
My DH (who built it evenings over the course of a year) tried to DIY most of it, but we did splurge on Auralex and haven’t regretted it — it is so dead, and I mean that in the best way — perfect for audiobooks, especially. I go in there and don’t emerge for hours, which is why we call it Heather’s Playhouse: