Remarkable device significantly diminishes traffic noise: The new ultra-slim sound blocker offers a substantial reduction in traffic sounds.
In a groundbreaking development, the Swiss Federal Laboratories for Materials Science and Technology (EMPA) have created an ultra-thin traffic noise absorber. This innovative material, just 2.1 inches thick, could become a standard feature in construction projects where noise control and space efficiency are top priorities.
The ultra-thin traffic noise absorber works by using a multi-layer mineral foam (gypsum/cement) whose layers have different pore sizes and perforation patterns. This unique structure forces sound waves into longer, winding paths, dissipating them as heat rather than passing straight through a flat absorber.
Each layer in the multi-layered mineral foam contains pores of different sizes, a feature that allows air particles to take tortuous routes. This extended path increases viscous and thermal losses, converting sound energy to heat, and improving low-frequency absorption compared with uniform foams.
EMPA used numerical modelling to design and tune pore sizes, perforation patterns, and layer thickness to target specific noise types (e.g., traffic) and to optimise absorption for particular frequency ranges. Field testing in Zurich produced an overall traffic-noise reduction of about 4 dB and was especially effective for cars approaching or leaving the driveway.
The material is weatherproof, fireproof, and recyclable, making it durable and environmentally friendly. EMPA is working with Swiss manufacturer De Cavis to streamline production and prepare for broader commercial use. However, the current production method is time-consuming due to the manual perforation process, a factor that EMPA aims to industrialize.
While the ultra-thin traffic noise absorber performs on par with much bulkier products, such as rock wool, it is less effective on some high frequencies. Nevertheless, this innovation could be a game-changer for those dealing with constant background noise from traffic, nearby businesses, or shared walls.
Noise pollution not only interrupts your day but also affects your health, mood, and productivity. The versatile, slim, and powerful sound absorber is more than just a material upgrade; it's a lifestyle upgrade. A thinner absorber means you can enjoy peace and quiet without sacrificing living or workspace space.
The work being done to bring this technology to market suggests that quieter cities, homes, and workplaces may be within reach much sooner than expected. With the potential to revolutionise the construction industry and improve the quality of life in noisy urban environments, the ultra-thin traffic noise absorber is a development to watch.
This ultra-thin traffic noise absorber, designed using technology and science, not only improves sound absorption but also addresses health concerns related to noise pollution. Its unique structure, containing layers with varying pore sizes and perforation patterns, makes it weatherproof, fireproof, and recyclable, reflecting its durability and eco-friendliness.
