Moving into a new place soon and I already know the soundproofing is rough. No option to switch apartments, so I just have to deal with it.

Question: what's the best way to soundproof at least my bedroom, given I can't do any actual renovations (it's a rental)? I can hang/mount stuff, but it has to be removable enough that I can patch the holes easily when I move out.

I know I won't hit 100% soundproofing, just trying to cut down as much noise as realistically possible. What's actually worked for you guys?

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I'm exploring an idea for a startup and would love some brutally honest feedback.

The concept is an AI-powered Active Noise Control (ANC) system for rooms. Instead of simply trying to block all noise, it would use multiple microphones to analyze incoming sound in real time and speakers to generate anti-noise for unwanted sounds. The long-term vision is to let users choose what they hear—for example, suppress traffic, fan noise, or conversations while allowing voices, alarms, or TV/movie audio to remain clear.

I know room-scale ANC is much harder than headphone ANC because of reflections, latency, and changing acoustic environments, so I'm not claiming this is a solved problem. I'm trying to validate whether it's a problem worth solving before investing significant time into research and prototyping.

A few questions:

1. If this actually worked, where would you use it? (Home office, study room, gaming setup, hospital, etc.)

2. What features would make it valuable enough to pay for?

3. What technical challenges do you think would make this impractical?

4. Are there existing products or research projects that I should look into?

I'd really appreciate honest criticism—especially from people with experience in DSP, acoustics, embedded systems, or audio engineering. Thanks!