The transfer matrix method that is often used to model layered or lumped acoustical systems
was inspired by a classical methodology commonly used in electrical engineering. To take …

The structural damping performance of limp porous media: ie, fibrous layers with negligible
bulk frame elasticity, was investigated previously. Presented here is a study focusing on …

Modeling methodologies based on state-of-the-art and classic theories of acoustics have
been developed to provide a comprehensive toolbox, which can be used to model multilayer …

Properly designed porous materials can provide damping equivalent to conventional
viscoelastic dampers by the dissipation of the evanescent wave energy in the vibrating …

It has recently been demonstrated that layers of fibrous," acoustical" material can effectively
damp structural vibration in the sub-critical frequency range. In that frequency range, the …

A properly designed limp porous materials such as fibrous layers can provide damping
equivalent to conventional viscoelastic dampers while providing advantages such as light …

• Objectives: modeling, predicting and optimizing the near-field damping performance of
conventional sound absorbing materials (fiber, foam, etc.), so that a properly-designed …