Hynes Convention Center Tunnel - Transportation Noise Project - Acentech The suspended ceiling on the Massachusetts Turnpike (I-90) tunnel was originally constructed to provide ?re protection for the massive steel girders that support the above Prudential Center and Hynes Convention Center. Since then additional ?re protection measures have been implemented, rendering the ceiling unnecessary. The Massachusetts Convention Authority (MCCA) decided to remove the suspended ceiling, but concern over the possibility of increased transmission of noise into conference and dining facilities within the convention center prompted the hiring of Acentech. Acentech made acoustic and vibration measurements and performed analyses to see what improvements, if any, could be made to Simpson Gumpertz & Heger’

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