Acoustic and vibration background noise in the collapsed structure of the World Trade Center (L)

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Abstract

Measurements of acoustic and vibration background noise were made on 18 September 2001 at the southern edge of the World Trade Center collapse. Sensors were deployed in a configuration reasonable for survivor search and near an on-going recovery operation and heavy debris removal. Geophones were placed on steel beams that extended into a deep void and a microphone was lowered below ground level into a pocket in the rubble. Even in what appeared at ground level to be a high-noise environment, weak or distant taps and bangs generated either by the authors or by recovery personnel produced distinct signals from the microphone and geophones.

Original languageEnglish (US)
Pages (from-to)45-48
Number of pages4
JournalJournal of the Acoustical Society of America
Volume113
Issue number1
DOIs
StatePublished - Jan 1 2003

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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