Article: Pennsylvania Inventor Develops Angular Specific Sound Absorption Spectrum Measurement Method

Article: Sound Absorption Coefficients of Micro-fiber ...
Textile Research Journal;  September 1, 2007 ;     700+ words ...Abstract The sound absorption properties of materials are important ... these materials' application for sound absorption, thus new textiles were to be ... layers. It can be also used for sound absorption. This paper examines the possibility ...

Article: Recycling Polyester and Polypropylene Nonwoven Selvages to ...
Textile Research Journal;  May 1, 2005 ;     700+ words ... ... then stirred well. The functional sound absorption composites were produced by a compress ... processing parameters and materials on the sound absorption efficiency of the composites. The sound absorption coefficients were measured according ...

Article: Japanese Inventor Develops Actively-Controlled Sound ...
US Fed News Service, Including US State News;  May 8, 2007 ;     542 words ... ... has developed an actively-controlled sound absorption panel system using movement-controlled ... Office: "A space constituted by a sound absorption panel section and active sound absorption control system section between the inner ...

Article: On the absorption spectrum of noble gases at the ...
Journal of Research of the National Institute of Standards and Technology;  November 1, 2005 ;     700+ words ... ... obtained that describes the behavior of absorption spectrum intensity. This offers qualitative ... some metal vapors. Key words: absorption spectrum of noble gases; Fano resonance ... 12, 154-161 (1935)] On the Absorption Spectrum of Noble Gases at the Arc Spectrum ...

Article: Patent No. 7,571,790 Issued on Aug. 11 for Sound ...
US Fed News Service, Including US State News;  August 11, 2009 ;     417 words ... ... Do, South Korea, has developed a sound absorption block and a method of constructing ... Patent & Trademark Office: "A sound absorption block installed at a music box, a ... The present invention provides a sound absorption block, including a lower plate where ...

Article: Journal of Applied Polymer Science: Sound ...
Cellular Polymers;  September 1, 2006 ;     552 words ... ... emulsion polymerisation methods. Sound absorption materials were then prepared by enclosing ... characteristic frequency band where the average sound absorption coefficient was 0.4 and the maximum ... higher sound coefficient than porous sound absorption materials such as PU foam with ...

Article: Polymer Plastics Technology and Engineering: Recycled ...
Cellular Polymers;  November 1, 2006 ;     700+ words ... ... coated aluminium, expanded polystyrene and coir pith resulted in improved sound absorption and noise reduction in insulation panels prepared from the waste. Sound absorption properties similar to expanded polystyrene or glass wool were achieved ...