MEASUREMENTS OF ACOUSTIC PRESSURE AT HIGH AMPLITUDES AND INTENSITIES

Tabmep Assessment Polarcat o3 Measurements 1 Introduction Here
1455 EITHER CAT 47 CONTINUOUS CATHETER IMPEDANCE MEASUREMENTS GUIDES
15A NCAC 02B 0508 TESTS AND MEASUREMENTS APPLICABLE TO

21 NMR T1RELAXATION MEASUREMENTS ON PARAMAGNETIC ORGANOLANTHANIDES AN ALTERNATIVE
4 POINT MEASUREMENTS GENERAL WHY 4 POINT
A LINACBASED NEUTRON SOURCE FOR TIMEOFFLIGHT (TOF) MEASUREMENTS

Title: Measurements of acoustic pressure at high amplitudes and intensities

Measurements of acoustic pressure at high amplitudes and intensities

L.A. Crum¹, M.R. Bailey¹, P. Kaczkowski¹, J.A. McAteer², Y.A. Pishchalnikov³, and O.A. Sapozhnikov³

¹Center for Industrial and Medical Ultrasound, Applied Physics Laboratory,

University of Washington, 1013 NE 40^th Street, Seattle, WA 98105, USA

[email protected]

²Department of Anatomy and Cell Biology, Indiana University,

635 Barnhill Drive, Indianapolis, IN 46202, USA

³Department of Acoustics, Faculty of Physics, M. V. Lomosov Moscow State University, Leninskie Gory, Moscow 119992, Russia

Abstract Text: In our research group, we desire measurements of the large pressure amplitudes generated by the shock waves used in shock wave lithotripsy (SWL) and the large acoustic intensities used in High Intensity Focused Ultrasound (HIFU). Conventional piezoelectric or PVDF hydrophones can not be used for such measurements as they are damaged either by cavitation, in SWL applications, or heat, in HIFU applications. In order to circumvent these difficulties, we have utilized optical fiber hydrophones in SWL that do not cavitate, and small glass probes and a scattering technique for measurements of large HIFU intensities. Descriptions of these techniques will be given as well as some typical data.

Metrological significance: We present techniques for measuring acoustic quantities that are not possible using conventional techniques.

A SUMMARY OF GEODETIC SATELLITE MEASUREMENTS AT THE SOUTH
ANTHROPOMETRIC MEASUREMENTS AND BODY SILHOUETTE OF WOMEN VALIDITY AND
ASSESSING RENAL FUNCTION RENAL MEASUREMENTS MEASURING BLOOD VOLUME 6

Tags: acoustic pressure, measuring acoustic, acoustic, pressure, amplitudes, intensities, measurements