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The Effect Of Edge Constraints On The Surface Normal Impedance Of Layers Of Elastic Porous Materials, N.-M. Shiau, W. Desmet, J Stuart Bolton
The Effect Of Edge Constraints On The Surface Normal Impedance Of Layers Of Elastic Porous Materials, N.-M. Shiau, W. Desmet, J Stuart Bolton
Publications of the Ray W. Herrick Laboratories
A two-dimensional model for wave propagation in elastic porous materials has been used to investigate the effects of edge constraints on the surface normal impedance of elastic porous materials when placed in standing wave tubes. The elastic porous material model used was based on the Biot theory and takes into account the three wave-types known to propagate within elastic porous materials. Previous work has indicated that the acoustical behavior of typical noise control foams can be very sensitive to small mounting details. Consequently, it is reasonable to expect that the surface normal impedance measured by placing foam in a standing …
Enhancement Of The Transmission Loss Of Panel Structures Through The Application Of Segmented, Resonant Foam Attachments, J. Stuart Bolton, Yeon June Kang
Enhancement Of The Transmission Loss Of Panel Structures Through The Application Of Segmented, Resonant Foam Attachments, J. Stuart Bolton, Yeon June Kang
Publications of the Ray W. Herrick Laboratories
No abstract provided.
Extension Of The Receptance Technique To Accommodate Distributed Connections, Bryce K. Gardner, J Stuart Bolton
Extension Of The Receptance Technique To Accommodate Distributed Connections, Bryce K. Gardner, J Stuart Bolton
Publications of the Ray W. Herrick Laboratories
The receptance techniques has been used most frequently to analyze the vibrational response of structures that may be idealized as a set of substructures connected at one or more discrete points. However, the receptance technique can also be used to analyze the response of structures connected along particular types of line junctions. In this paper, an extension of the the receptance technique is presented that makes use of a generalized Fourier series approach to allow the evaluation of both the free and forced response of systems comprising components connected through spatially distributed junctions. The present extension is shown to reduce …