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UL Research Institutes is a leading independent safety science organization with global reach. We sense and act on risks to public safety with bold hypotheses and objective investigations.
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Open vs. Closed Door Decibels
FSRI
This video from 2017 shows features Stephen Kerber, Vice President of Research and Director of UL FSRI taking decibel readings and the difference in sound loudness of a smoke alarm with the door open and the door closed.
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