Accession Number : AD0693217

Title :   BIOPHYSICAL RESEARCH ON THE CETACEAN'S EAR BONES.

Descriptive Note : Doctoral thesis,

Corporate Author : LABORATOIRE DE PHYSIOLOGIE ACOUSTIQUE JOUY-EN-JOSAS (FRANCE)

Personal Author(s) : Giraud-Sauveur,Dominique

Report Date : OCT 1968

Pagination or Media Count : 117

Abstract : Certain physical properties of the ossicles of the middle ear in Odontocete Cetacea were studied in relation with the distinct perception of echolocation echoes and of the ultrasonic frequencies which they include. The research was made in comparison with other species, aquatic, amphibious, terrestrial and flying, which employ, or do not employ, sonar systems. Measurements were made for the following points: density, mineral analysis, speed of sound propagation, X-ray diffraction patterns, microradiography and electron microscopy, at once on different ossicles, and in comparison with cranial bones. (Author)

Descriptors :   (*EAR, *CETACEA), BONES, DENSITY, RADIOGRAPHY, MEASUREMENT, ELECTRON MICROSCOPY, HEARING, ULTRASONIC RADIATION, THRESHOLDS(PHYSIOLOGY), SONAR

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE