PLASTIC scrapThis paper presents the initial prototypes of solutions designed using plastic caps, seeking acoustic applications for both airborne sound insulation and the acoustic conditioning of rooms. Plastic caps are a waste product from the packaging sector and they constitute a maj...
The sound waves detected by acoustic sensors are the result of defect growth or even plastic deformation. The magnitude and distance of the defect from the sensor influence the acoustic energy measured at the sensor. AE monitoring has also been utilized to identify real significant leaks in ...
Twitter Google Share on Facebook soundproofing (redirected fromAcoustic insulation) Encyclopedia Related to Acoustic insulation:Soundproofing soundproofing (ˈsaʊndpruːfɪŋ) n materials used to make something soundproof Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 ...
This paper proposes a purely flexible lightweight membrane-type acoustic structure, wherein one kind of flexible lightweight rubber material takes the roles of mass and stiffness and another type of lightweight flexible EVA (ethylene–vinyl acetate copolymer) or plastic material functions as the local...
Open-cell plastic foam sheets with smooth, closed surfaces are heated up to a predetermined temperature after extrusion, are thermoformed in a thermoforming unit with the aid of a vacuum on both sides and are thermoset. One of the two c... H Joppen,P Daniels,JOD Buijsch - US 被引量: ...
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In this group are sound-absorbing panels of porous plastics that have a cellular structure—for instance, polyurethane foam and polystyrene foam plastic. The solid materials of fibrous structure are made in the form of panels—among them are “Akminit” and “Akmigran” in the USSR and “...
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Controlling audible sound requires inherently broadband and subwavelength acoustic solutions, which are to date, crucially missing. This includes current noise absorption methods, such as porous materials or acoustic resonators, which are typically ineff
They also describe the application of ring-down counting to the study of the metallurgical variables affecting the acoustic-emission activity of steels. They show how, in the case of plastic deformation, it can be used to determine the plastic zone size and hence the size of defects. 展开 ...