Mini-sparker application to hydrophones calibration and diffraction investigation

Author

Ahyl, A. ; Kemmou, A. ; Pernod, P. ; Merlen, A.

Volume

2

fYear

1994

fDate

Oct. 31 1994-Nov. 3 1994

Firstpage

647

Abstract

A transient sound source based on an underwater spark discharge, has been developed for acoustic impulse phenomenon studies. The emitted wave is omnidirective and presents a very short and simple signature resulting from its broadband frequency characteristics. Two specific applications are presented: hydrophone impulse response measurement, first, and study of diffraction by a glass sphere immersed in water, secondly. In this last application, high speed cinematography (1 Million frames/sec), based on the shadowgraph technique, has been used for the interpretation of the different diffracted waves

Keywords

acoustic wave diffraction; calibration; cinematography; hydrophones; sparks; underwater sound; acoustic impulse phenomenon studies; broadband frequency characteristics; diffraction investigation; glass sphere; high speed cinematography; hydrophones calibration; impulse response measurement; mini-sparker application; omnidirective wave; shadowgraph technique; transient sound source; underwater spark discharge; Acoustic diffraction; Calibration; Hydrophones; Motion pictures; Sparks; Underwater acoustic measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE

Conference_Location

Cannes, France

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1994.401729

Filename

401729