Abstract
The purpose of this paper is to illustrate a method for separating waterborne acoustic paths, using correlation techniques. The physical setup consisted of three hydrophones and an underwater speaker at a “quiet” test facility. The signals were recorded simultaneously on an FM tape recorder. The tape recordings, filtered from 200 to 2000 cps to avoid aliasing, were digitized at 7200 samples/sec, introduced into the Univac 1107 computer, and the correlation, power, and phase functions obtained. The crosscorrelation between the speaker and hydrophone separates the direct and indirect signal according to their time of arrival. The section of the correlogram containing the direct signal is considered, while all other values are set to zero; then, the power and phase associated with this section are determined. The section containing the indirect signal is given similar consideration. Mathematical descriptions of the power and phase are found to be in good agreement with these experimental results.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
