Comet Trim™ is an analytical tool that computes the acoustic characteristics of multi-layered, planar materials consisting of structural, elastic-porous and fluid layers. This module can be utilized for rapid acoustic characterization since no modeling is required. Analysis features include:

¨ Performance analysis: Computes acoustic characteristics of multi-layered materials.

¨ Inverse characterization: Evaluates macroscopic fluid properties of foam and fiber materials from measured acoustic characteristics.

 

Features

· Transfer matrix and four-pole parameters methods of solutions

· Bonded and un-bonded interface conditions

· Normal and random incident excitations

· Capability to compute

- Sound transmission loss

- Sound absorption coefficient

- Complex impedance

- Equivalent bulk properties

- Wave number, phase speed and attenuation

 

· Finite dimensional sample correction

· Rigid and non-rigid termination conditions

 

· Capability to handle wide variety of material types

- Elastic foam

- Rigid foam

- Limp foam

- Fibrous foam

- Perforated panel

- Resistive screen

- Impervious screen

- Structural panel

- Air gap

 

Microscopic cross sectional view of an elastic porous material

Comet Trim

Multi-Layer insulator with perforated facing

¨  Sensitivity & Optimization: Computes acoustic performance sensitivities  that can be used to optimize acoustical performance.