Navigation Links
Noise protection - multifunctional and aesthetical
Date:1/14/2013

Too much noise causes illness. This is as an undisputed fact nowadays, and yet we're still constantly assailed by noise as we go about our daily lives, be it from traffic or voices in large open-plan offices. Noise pollution can be reduced with the help of structural solutions; we've all seen noise barriers along busy roads and train lines, and there are special acoustic structural components, so-called sound absorbers, which are used inside buildings to keep noise levels down. But there's a problem. The construction components used up until now may well be effective at reducing noise, but they are not often very functional. Architects who incorporate soundproofing measures into their designs often complain about the inflexibility of modern materials. Limiting factors that affect the choice of material include weight, fire resistance or the hygienic requirements involved when designing large-scale kitchens or laboratories. After all there's also an aesthetic aspect; hardly anyone would say that a solid concrete wall along a road was attractive.

Scientists at the Fraunhofer Institute for Building Physics IBP are working on new solutions. "One of the main things we are focusing on developing is microperforated construction components. This technology is suitable for all types of material and enables the production of multifunctional, visually appealing sound absorbers that can be used for a flexible range of applications," explains Prof. Dr. Philip Leistner, acting institute director and head of the acoustics department at the IBP. Microperforated absorbers consist of membranes or sheets that have been perforated with a multitude of tiny holes or slits. When sound waves strike the surface as oscillating air molecules, friction is generated between the air in motion and the edge of the miniscule openings. It is this loss of energy that results in the sound being absorbed. The only prerequisite is that there is an air chamber located behind the openings, to allow the molecules to continue oscillating once they have passed through, as otherwise the sound would simply be reflected. Depending on the material, the holes are drilled, punched or pricked. "Above all, it's a question of cost efficiency," explains Prof. Leistner. "When it comes to ensuring the manufacturing process is cost-effective, it's important to realize that not all methods are equally well suited for every material." For it goes without saying that despite all the advantages they offer, sound absorbers must also remain affordable. Stuttgart staff and their industrial partners have already worked together to develop a whole generation of market-ready microperforated acoustic construction components. The technology means that, for the first time, it is possible to make sound absorbers that are both transparent and translucent. When mounted onto building faades or as noise barriers at the roadside, these materials have the desired effect without detracting from the landscape, and they can also be superbly integrated into the interior architecture of buildings.

Elastic surfaces for hygiene-sensitive areas

New additions to the sound absorber family are expected thanks to the latest developments at the IBP. Scientists there are working on elastic surfaces that are made of tubes arranged side by side, with microscopically small spaces in between. "It's a bit like having a brush with bristles that are enhanced by little extra attachments at the ends only much denser," explains Prof. Leistner. Such a pliable surface means even micro-holes can be cleaned easily, making it a material that is particularly suitable for use in hygiene-sensitive areas. Extrusion technology has proved especially cost-effective for large-scale applications. This method produces a two-dimensional surface profile with micro-slits, air chambers and base plate by pressing materials such as plastic or aluminum through a shaped nozzle. In the same way as with window and faade profiles, this creates finished, one-piece absorber components that come off the production line as a continuous length of material, eradicating the need for complicated mounting procedures which proved often more expensive than the material itself. Fraunhofer scientists will be presenting prototypes of these new developments alongside tried and tested solutions at the BAU 2013 construction trade fair from January 14-19 in Munich (Hall C2, Booth 131/135).


'/>"/>
Contact: Philip Leistner
philip.leistner@ibp.fraunhofer.de
49-711-970-3346
Fraunhofer-Gesellschaft
Source:Eurekalert  

Related medicine news :

1. Earphones potentially as dangerous as noise from jet engines, according to new study
2. Report: Strategies to prevent noise-induced hearing loss, tinnitus in soldiers
3. Substantial road traffic noise in urban areas contributes to sleep disturbance and annoyance
4. Hearing Restored in Mice With Noise-Induced Deafness
5. Study supports urate protection against Parkinsons disease, hints at novel mechanism
6. IntelliQuote Works to Educate Consumers about the Importance of Life Insurance Protection and to Make Coverage More Readily Available
7. Local Woodinville Contractor, Washington State Kitchen and Bath, Combats Toxic Mold, Adhering to the Toughest Mold Protection Standards in the Nation with New Promotion
8. Extra Pounds May Offer Protection to Heart Failure Patients
9. Can herbal products provide sun protection?
10. New Vaccine May Offer Protection From Deadly Nipah Virus
11. Some Families May Have Natural Protection Against Dementia
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Noise protection - multifunctional and aesthetical
(Date:2/5/2016)... ... February 05, 2016 , ... The event is being ... Block Event Center in Minneapolis, Minn. Triumph Over Parkinson’s will fund nearly $100,000 for ... of Schneiderman’s Furniture, lives with Parkinson’s disease and is the architect of this informative ...
(Date:2/5/2016)... ... , ... After years as an active staff surgeon and having served as ... Wayne Carman transitioned to chief of the Division of Plastic Surgery at what is ... chief and began a second three-year term in January of 2016. , The original ...
(Date:2/5/2016)... ... February 05, 2016 , ... Regular gym users know ... having to wait longer to access the treadmills. It’s a predictable trend. After the ... lose weight and get in shape by joining gyms, starting new walking or running ...
(Date:2/5/2016)... Georgia (PRWEB) , ... February 05, 2016 , ... Dr. ... to announce their 2nd Annual No Cost Dental Day to individuals in need. The ... The purpose of this No Cost Dental Day is to provide dental care to ...
(Date:2/5/2016)... ... February 05, 2016 , ... Health and wellness is a topic that should ... event they are experiencing an illness. Migraines are a severe form of a headache ... migraines would not wish the pain on their worst enemy, the feeling can last ...
Breaking Medicine News(10 mins):
(Date:2/5/2016)... , Feb. 5, 2016  Aralez Pharmaceuticals Inc. ... of POZEN Inc. ("POZEN") and Tribute Pharmaceuticals Canada Inc. ("Tribute") ... and shareholders of Tribute. The combined company will operate ... company with operations in Canada , ... United States . Under the terms of the ...
(Date:2/5/2016)... February 5, 2016 --> ... report states that the global active pharmaceuticals ingredients (APIs) ... predicted to reach US$185.9 bn by 2020. It is ... 2014 to 2020. The title of the report is ... by Geography, and by Therapeutic Area) - Global Industry ...
(Date:2/5/2016)... Feb. 5, 2016  Henry Schein, Inc. (NASDAQ: HSIC ... and services to office-based dental, animal health and medical ... agreement to acquire a majority ownership interest in Dental ... in Brazil . ... Dental Cremer is the dental distribution business of Cremer ...
Breaking Medicine Technology: