This sound-suppressing silk can create quiet spaces

Acoustics News

This sound-suppressing silk can create quiet spaces
Textiles And ClothingWearable TechnologyCivil Engineering
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Researchers developed a silk fabric, which is barely thicker than a human hair, that can suppress unwanted noise and reduce noise transmission in a large room.

We are living in a very noisy world. From the hum of traffic outside your window to the next-door neighbor's blaring TV to sounds from a co-worker's cubicle, unwanted noise remains a resounding problem.

In the other, more surprising technique, the fabric is held still to suppress vibrations that are key to the transmission of sound. This prevents noise from being transmitted through the fabric and quiets the volume beyond. This second approach allows for noise reduction in much larger spaces like rooms or cars.

In the new work, the researchers flipped that idea to create a fabric loudspeaker that can be used to cancel out soundwaves. However, this technique is only effective over a small area. So, the researchers built off this idea to develop a technique that uses fabric vibrations to suppress sound in much larger areas, like a bedroom.

Their experiments also revealed that both the mechanical properties of a fabric and the size of its pores affect the efficiency of sound generation. While silk and muslin have similar mechanical properties, the smaller pore sizes of silk make it a better fabric loudspeaker. Moving forward, the researchers want to explore the use of their fabric to block sound of multiple frequencies. This would likely require complex signal processing and additional electronics.

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