Before we give you our recommendations, let us tell you first the features you should consider in a soundproof blanket:
When it comes to soundproofing, the thicker is always better. The thicker the blanket the more sound it can absorb and convert into heat energy. Because of that though, these blankets are a bit heavy and may be hard to hang on a surface.
What we mean by design isn’t the looks, but what the blankets were designed for. For example, if your intent is to soundproof a room for recording purposes, you need to opt for a soundproof blanket with enough acoustic capability to block out lower tones as much as it can.
If you’re intent is simply to reinforce the soundproof capability of your home through the windows or doors, then a cheap moving blanket will do.
There is a lot more to do this than meets the eye. The object you would like to cover, for example, should be considered in selecting the type of soundproof blanket. If you would be covering a noisy refrigerator, then you would need a quilted design that can also absorb temperature.
You should also pay attention to whether the blanket is easy to install or not. Some blankets have grommets in them as you see in curtains.
Unfortunately, most don’t have them. If a blanket doesn’t have grommets, it’s advisable that you put some to make it easier to install and manage.
Finally, the price. Expensive doesn’t always mean better. However, cheaper blankets could mean lesser material (in quantity or quality). Better check the specifications of a soundproof blanket and see if the price is worth it.