Article: French Inventors Develop Active Sound Attenuation Device

Article: Sound Attenuation of the Indoor/Outdoor Range E-A-R ...
Military Medicine;  July 1, 2004 ;     700+ words ...The sound attenuation provided by the AOSafety Indoor ... of their level. However, the sound attenuation is frequency dependent. Typically ... plug, provides conventional sound attenuation of approximately 22 dB. The ...

Article: New sound attenuation line combines materials, ...
Diesel Progress North American Edition;  March 1, 1997 ;     700+ words ...A new line of sound attenuation products, using a variety ... manager of dB Foam. The dB Foam sound attenuation product range is built around ... number of specialty composites. Sound attenuation is by nature an individual ...

Article: Texas Inventor Develops Engine Noise Suppression Exhaust ...
US Fed News Service, Including US State News;  June 24, 2008 ;     591 words ... ... conventional noise suppression exhaust sound attenuation systems receive structural and functional ... of conventional configurations of sound attenuation systems for exhaust augmenters and ... specially-designed kits in existing sound attenuation systems. Proper installation ...

Article: Cummins' Tier 3 acoustic generator set's offer sound ...
Mining Engineering;  January 1, 2008 ;     511 words ... ... They are vailable in steel or aluminum with two levels of sound attenuation. The generator set and enclosure packages are intended ... are available in two levels of attenuation. The quieter sound-attenuation package features an enhanced exhaust silencer and steel ...

Article: Chinese Inventors Develop Sound Attenuation ...
US Fed News Service, Including US State News;  July 12, 2008 ;     435 words ... ... a sound attenuating structure. According to the U.S. Patent & Trademark Office: "The invention discloses a sound attenuation panel comprising, a rigid frame divided into a plurality of individual cells, a sheet of a flexible material, and a ...

Article: Field verification of sound attenuation modeling ...
Journal of the Air & Waste Management Association;  July 1, 2006 ;     700+ words ... ... explosive charge weight on sound propagation is well documented. However, the influence of variable atmospheric conditions on sound attenuation and/or enhancement is not fully understood. (4,5) Accounting for the influence of weather conditions on sound propagation ...

Article: Connecticut Inventors Develop Sound Attenuation Air ...
US Fed News Service, Including US State News;  October 2, 2006 ;     416 words ... ... Russel H. Marvin of Goshen, Conn., and Bret Sleicher of Naugatuck, Conn., have developed an air impeller with both sound attenuation and vibration isolation means in a compact assembly. According to the U.S. Patent & Trademark Office: "Three ...