As an AI language model I don't have personal preferences or feelings. But, here are a few properties of soundproof curtains that make them a popular choice for soundproofing:
1. Highly dense materials - Soundproof curtains are made of dense materials such as acoustic foam, fiberglass, or dense polyester that help reduce the sound and block outside noise.
2. Thick and heavy fabric - The heavy fabric absorbs and deflects sound waves, which helps to reduce noise entering or leaving a room.
3. Multiple layers - Soundproof curtains usually have multiple layers of materials which provide better noise insulation properties.
4. Floor-to-ceiling length - Soundproof curtains should be hung from the ceiling to the floor to prevent sound waves from escaping or entering through gaps.
5. Easy to install - They are easy and quick to install onto existing curtain rods in any room without the need for any special equipment or professionals.
6. Aesthetic appeal - Soundproof curtains come in a variety of colors, patterns, and designs that can complement the room decor.
7. Cost-effective - Compared to other soundproofing options such as installing acoustic tiles or panels, soundproof curtains are relatively cheaper.
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