Accession Number : ADA332518

Title :   Precision Imaging and Measurements for Structural Acoustics

Descriptive Note : Final rept. Jul 94-Sep 97

Corporate Author : GEORGIA INST OF TECH ATLANTA

Personal Author(s) : Berthelot, Yves H.

PDF Url : ADA332518

Report Date : 30 NOV 1997

Pagination or Media Count : 13

Abstract : A fiber optic laser Doppler interferometric system has been designed, built, and tested for measurements (0.5 - 3kHz) of surface vibrations in structural acoustics. The two complex elastic moduli of a voided polymer have been measured as a function of frequency. The measurement errors associated with this new technique are discussed.

Descriptors :   *FIBER OPTICS, *INTERFEROMETRY, *SURFACE ACOUSTIC WAVES, VIBRATION, SHEAR MODULUS, VISCOELASTICITY, OPTICAL INTERFEROMETERS, LASER APPLICATIONS, DOPPLER SYSTEMS, ELASTIC WAVES, SECONDARY WAVES, BLOCK POLYMERS, BULK MODULUS, COMPRESSION WAVES.

Subject Categories : Acoustics
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE