 In another technique, the fabric is held still to suppress the vibrations that are keyed to the transmission of sound, preventing noise from being transmitted through the fabric and quieting the volume beyond it. This approach could be used in much larger spaces like rooms or cars. By using common materials like silk, the noise-suppressing fabrics could be practically implemented in real-world spaces as dividers or thin fabric walls in open workspaces. Researchers measured the fabric, reducing sound transmission by as much as 75%.