CSA offers a wide range of testing, analysis, and design services for solving complex problems in noise control, with an emphasis on structural acoustics and vibro-acoustics.

Our testing and analysis capabilities help you understand the sources, transmission, and effects of noise and help us identify the most effective means of mitigating it. Models of products and systems are developed with sophisticated finite element and boundary element software. Cost effective solutions are proposed using accurate models to investigate design tradeoffs. Our integrated analysis-design-testing capabilities offer a wide range of services useful in any stage of product development--from prototype testing through final design.

CSA performs detailed on-site surveys to measure the acoustic and vibration environment of your facilities. Test engineers use microphones, structural transducers, acoustic intensity probes, and portable multichannel analyzers to measure acoustic and vibration levels. Products can also be brought to CSA for an extensive set of acoustic and vibration tests. Detailed reports are provided to help you decide on the solution that will best suit your needs.

Our work in structural acoustics relies heavily on structural analysis and damping design. CSA engineers are experienced in finite element analysis, boundary element analysis, solid modeling, and the design of viscoelastic damping treatments. Models are generated, manipulated and studied using IDEAS, NASTRAN and COMET/ACOUSTICS. Detailed structural-acoustic models can compute the acoustic radiation of vibrating structures, analyze the sound transmission of flexible bodies, and predict the acoustic field on the interior of enclosed spaces. A proprietary viscoelastic material database enables us to design passive damping treatments that reduce structural response and prevent sound transmission.
 

Design of noise control solutions is tightly integrated with the analysis. Sensitivity studies determine how strongly the acoustic field is affected by changes in structural parameters; panel calculations are useful for understanding which structural components are contributing most heavily to the acoustic response; and effective damping treatments are designed by choosing materials from a proprietary database. With this information, CSA can propose structural changes, sound absorbing treatments, and passive damping designs that will reduce acoustic levels.

CSA also implements and conducts research in active noise control. We implement ANC with speakers and other actuators using feedback and adaptive feedforward control algorithms run on fast DSP platforms.

Fairing noise control / Finite element modeling / Dynamic testing