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Exhibition Status Update!

With 3 weeks until SHOWTIME, the 20th Anniversary edition welcomes an All-Star cast of new and returning exhibitors, making up the largest DOMOTEX asia/CHINAFLOOR to date. Due to high demand in all product...

Global designers to exhibit at Luxury Br…

Designers from Europe, Middle East and North America will exhibit at the upcoming Luxury Brands Carpet Show. The second edition of the curated Luxury Brands exhibition and designer carpet collection is scheduled to...

H&M to dress Swedish teams for Olymp…

Hennes and Mauritz Group (H&M) will dress the Swedish teams for the Winter Olympics and Paralympics in PyeongChang 2018. The company will create outfits for the opening and closing ceremonies. The collection will...

Saurer to show Allma TechnoCorder TC2 at…

Saurer Technologies GmbH & Co. KG Twisting Solutions, a leading provider of energy efficient solutions for tire cord, carpet, staple, glass filament, and industrial yarns, will present its Allma TechnoCorder TC2 innovative machine...

Cone Denim and Unifi launch S Gene with …

Cone Denim and Unifi have launched the latest in advanced stretch technology - S Gene with Repreve . Combining the advanced stretch technology of S Gene with the superior sustainability and performance of...

Shima Seiki to partake in Premiere Visio…

Leading computerised knitting machine developer, Shima Seiki Mfg., Ltd., is set to participate at the Premiere Vision show, a global event for fashion professionals, to be held in Paris, from February 13 to 15, 2018...

Measurably more productive and econom- i…

Even if the winding machine is only responsible for about 10-15% of the energy consumption (compressed air and electrical energy) when considering the classic ring spinning process, these criteria play an important role...

Wool to dominate at Intertextile Shangha…

Some 3,300 exhibitors from around 20 countries covering all apparel fabrics and accessories product groups are expected at the Spring Edition of the industry’s most comprehensive sourcing platform for the spring/summer season, Intertextile...

3D warp-knitted textiles – New aspect in sound insulation

3D warp-knitted textiles – New aspect in sound insulation

(Germany)

Noise is frequently irritating and has a negative effect on the nervous system, on comfort and on work performance. At a level of just 40 decibels, which corresponds to low radio noise, concentration can be reduced by 20-30%.

Sound-absorbing ceilings, partitions, floors and furniture surfaces can reduce disruptive noises, and are a promising application for materials having acoustic properties. It is estimated that there are roughly 3.2 million square meters of new office space alone in Germany.

Examples of conventional ways of reducing noise inside buildings include the use of pressed mineral wool or MDF sheets in ceilings, non-load-bearing partitions made from mineral wool or plasterboard, textile-covered flat pressed boards as mobile interior walls, and polystyrene in various applications - a whole range of systems that have now been complemented by a new solution made solely from textiles.

This new innovation features room elements made from warp-knitted spacer textiles and was developed at KARL MAYER. The product developers at this textile machinery building company were assisted in their work by acoustic specialists at the Fraunhofer Institut für Bauphysik, IBP (Fraunhofer Institute for Building Physics).

Principles of noise reduction

In order to reduce noise levels, sound should be both damped and absorbed.

Acoustic damping specifies how effectively noise from the air or a body is reflected at the surface and thus prevented from spreading. It is characterized by the degree of sound reflection.

With sound absorption, the sound energy is converted into other energy forms and is thus reduced. In this case, the main factor is dissipation – the transformation into thermal energy by friction, for example. The characteristic parameter for noise absorption is the degree of sound absorption.

Materials that are to be used as soundproofing materials must exhibit a high level of reflection and absorption. General design parameters and their influence on the acoustic behavior

The acoustic characteristics of spacer textiles can be modified specifically, in which case, the main parameters are their thickness and surface construction. Whereas the cover faces, with their specific microscopic roughness, are mainly responsible for reflecting the sound waves, dissipation or absorption occurs primarily in the spacer layer.

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Karl Mayer

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Kohan Textile Journal

Middle East Textile Journal

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