THOMAS B GABRIELSON
Engineers in State College, PA
License number
Pennsylvania PE049775E
Category
Engineers
Type
Professional Engineer
Address
Address
State College, PA 16803
Professional information
Two Geophone Underwater Acoustic Intensity Probe
US Patent:
6172940, Jan 9, 2001
Filed:
Jan 27, 1999
Appl. No.:
9/237529
Inventors:
James A. McConnell - Port Matilda PA
Gerald C. Lauchle - State College PA
Thomas B. Gabrielson - State College PA
Gerald C. Lauchle - State College PA
Thomas B. Gabrielson - State College PA
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
H04R 100
US Classification:
367178
Abstract:
Acoustic intensity is measured by a submerged probe consisting of two passive geophones mounted in spaced relationship with their sensing axes aligned. The geophones are connected through a cable to a remote spectrum analyzer in which acoustic intensity is computed from the velocity gradient between the two geophones. The exclusive use of geophones, which inherently have low impedance outputs, eliminates the need for preamplification in the probe. The geophones are mounted inside an acoustically transparent, thin rubber shell, which reduces the effects of noise due to flow.