a sound-absorbing composite material made of wood fiber and polyester fiber was produced using polyester foam technology and wood-based composite technology. this study investigated the physical and mechanical properties and the effects of the airflow resistivity of the materials and the depth of the cavities behind on sound-absorbing performance of the composite material. the results showed
embedding batteries into composite materials can have a positive effect on the acoustic properties by increasing the coincidence frequency. embedding batteries also increases the wavenumber amplitude for the first bending mode of vibration for both laminates and sandwich composites.
the use of composite materials for reducing weight in structures sometimes leads to a surprising and disappointing increase in noise and vibration levels. this paper presents a comparison of the acoustical performance of six panels with different material properties. the comparison was carried out u
m.a.d. propz is a shareware windows desktop application for beam cross-sectional properties and stress/strain analysis loaded with features like: analysis of any assembly of arbitrary cross
an analysis of the acoustic properties of composite materials %k composite materials; acoustic properties; modal analysis; testing methods; %x to help select the best material for loudspeaker boxes, we tested various types of polymer materials that are filled with fine, ground wood particles.
the term, which is more related to the analyses of acoustic signals considering the properties of the material, is acousto-ultrasonics , . nevertheless, it is an entirely different technique, which emphasises on detecting the flaws and evaluating the mechanical properties of the material using ae techniques.