A solid core door is more efficient at blocking noise because it’s much more dense. There are many different choices that will range from pricey hardwood to more affordable options, like those made from MDF
No, it will merely reduce echo and help in the slightest way, but it won’t stop the noise. Check out the best alternatives in this article.
Yes, a soundproof or sound-blocking curtain can greatly reduce the noise created inside that room from escaping outward. Accordingly, it can reduce noise as much as 70 or 80% which is quite a lot.