Accession Number : AD0683304

Title :   ULTRASONIC COUPLING LOSSES

Descriptive Note : Technical memo.

Corporate Author : PENNSYLVANIA STATE UNIV STATE COLLEGE ORDNANCE RESEARCH LAB

Personal Author(s) : Ghering, W L

PDF Url : AD0683304

Report Date : 01 Nov 1967

Pagination or Media Count : 126

Abstract : Coupling losses must be considered in ultrasonic measurements of small specimens of high Q materials. In these measurements, the energy loss in the bonding material is often of the same magnitude or larger than the loss in the specimen. This study is an investigation of the characteristics of coupling losses. The energy losses due to a coupling film or coupling by placing surfaces in optical contact were measured as a function of such varied parameters as frequency, bond thickness, bond composition, mechanical loading, surface conditions, relative alignment of transducer and specimen, and temperature.

Descriptors :   *TRANSDUCERS, *ULTRASONIC PROPERTIES, ACOUSTIC EQUIPMENT, BONDING, COUPLINGS, CRYSTAL DEFECTS, DAMPING, DROPS, ENERGY, FILMS, MATHEMATICAL MODELS, MEASUREMENT, MECHANICAL PROPERTIES, MEDICAL RESEARCH, QUARTZ, SINGLE CRYSTALS, TEST METHODS, VIBRATORS(MECHANICAL)

Subject Categories : Electrical and Electronic Equipment
      Acoustics
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE