US Patent:
20080310256, Dec 18, 2008
Inventors:
Benjamin A. Cray - West Kingston RI, US
Walter H. Boober - Newport RI, US
Stephen E. Forsythe - Portsmouth RI, US
Lee E. Estes - Mattapoisett MA, US
Andrew J. Hull - Portsmouth RI, US
International Classification:
H04B 1/16
H04B 1/08
Abstract:
An acoustic sensing device includes a housing having an internal cavity filled with a vibration decoupling medium. An acoustic window formed of an acoustically transparent material is mounted in the housing. This mounting can be by antivibration mounts to prevent housing noise from affecting the acoustic window. A scanning laser vibrometer is positioned within the housing and directed to detect vibrations of the acoustic window. Antivibration mounts are joined between said scanning laser vibrometer and said housing. In further embodiments, the scanning laser vibrometer detects vibrations at a plurality of locations on the acoustic window forming a virtual array.
