It is best to use sound blanket curtain. Noise dampening curtains are needed in factories when it is impractical to relocate a piece of equipment or reduce the noise exposure of a staff member. Industrial equipment enclosure is usually made of noise dampening curtain system, with a noise reduction of 26 dBA.
You can try noise reducing fence It is flexible soundproof barrier fence that provide maximum noise reduction. By combining sound blocking and noise absorbing materials into a flexible soundproof barrier, excellent sound insulation is achieved.