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Our consultants regularly engage in research activities related to our normal client services. This archive includes the majority of the published technical papers, presentations, and other publications related to this research.

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Blong Xiong Colin Gordon Dale Pekrul Hal Amick Michael Gendreau Stephen Jaeger Steven Lank
Acoustics Construction Vibration Groundborne Vibration Infrasound Instrument Isolation Structural Vibration Vibration and Noise Criteria

Evolution of Energy Contaminant Criteria:
Convergence or Divergence?

Overview•Energy-Contaminants and their Criteria –Vibration, Sound or Acoustic Noise, EMI/RFI, ESD, Thermal Variation•The Interface between instruments and the spaces containing them•Evolution & devolution –What is devolution? (in this context) –Is this new? –How evolution can lead to devolution•Examples•Addressing devolution...
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Evaluating and Modifying Existing Building Structures for Vibration-Sensitive Applications

Designing a vibration-sensitive facility, such as a laboratory building, as part of a tenant-improvement or renovation project can introduce significant challenges. Often in these projects, the existing building structure has not been designed to meet the vibration requirements of planned sensitive instruments or research, and therefore mitigation measures must be implemented to achieve the desired […]...
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Simplified parametric modeling to predict vibration attenuation provided by on-grade slabs

ABSTRACT When measured vibration amplitudes at the proposed site for a highly sensitive facility exceed the maximum allowable for the sensitive equipment, mitigation measures must be integrated into the design that will reduce the vibration amplitudes to meet the requirements. Past studies have shown that thick concrete slabs supported on a well-engineered subgrade can effectively […]...
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Construction vibration monitoring for sensitive facilities

Building expansion and densely developed campuses often require construction adjacent to highly vibration sensitive facilities such as advanced technology manufacturing, laboratories, and hospitals. The vibration generated by the construction work poses a considerable risk to the sensitive processes in these facilities, which typically need to continue operations during construction. In these scenarios it is often […]...
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Control of infrasonic noise from mechanical ventilation systems in sensitive imaging laboratories

High resolution imaging equipment, such as transmission and scanning electron microscopes, can be very sensitive to the environment in which they are installed.  Environmental factors including temperature, electromagnetic interference, vibration, and noise must be considered in the design of laboratories intended to house such instruments.  With regard to noise, this equipment is often most sensitive […]...
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