Accession Number : ADA255566


Title :   A Comparison of Acoustic Impedance Measurement Techniques


Descriptive Note : Progress rept.


Corporate Author : NAVAL UNDERSEA WARFARE CENTER NEWPORT DIV NEW LONDON CT NEW LONDON DETACHMENT


Personal Author(s) : Hull, Andrew J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a255566.pdf


Report Date : 01 Sep 1992


Pagination or Media Count : 25


Abstract : This report describes an investigation that compares two acoustic impedance measurement techniques. The first is a wave decomposition method that breaks the wave energy into reflected and incident components and then calculates acoustic impedance. The second is an inverse eigenvalue method that inverts the functional form of impedance tube eigenvalues and then calculates acoustic impedance. An experiment comparing the measured acoustic impedance from both methods results in similar values.


Descriptors :   *ACOUSTIC IMPEDANCE , *ACOUSTIC RESONANCE , *ACOUSTIC MATERIALS , MEASUREMENT , ACOUSTIC WAVES , ENERGY , EIGENVALUES , TUBES , SOUND TRANSMISSION , ACOUSTICS , IMPEDANCE , DECOMPOSITION


Subject Categories : Theoretical Mathematics
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE