Naval Postgraduate School
Dudley Knox Library
NPS Dudley Knox Library
View Item 
  •   Calhoun Home
  • Theses and Dissertations
  • 1. Thesis and Dissertation Collection, all items
  • View Item
  •   Calhoun Home
  • Theses and Dissertations
  • 1. Thesis and Dissertation Collection, all items
  • View Item
  • How to search in Calhoun
  • My Accounts
  • Ask a Librarian
JavaScript is disabled for your browser. Some features of this site may not work without it.

Browse

All of CalhounCollectionsThis Collection

My Account

LoginRegister

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

Design and application of an underwater acoustic parametric source

Thumbnail
Download
Icondesignapplicatio00khos.pdf (2.735Mb)
Download Record
Download to EndNote/RefMan (RIS)
Download to BibTex
Author
Khosla, Ranvir C.
Date
1973-12
Advisor
Eller, Anthony I.
Metadata
Show full item record
Abstract
Parametric sound generation has been an active area of applied research for the last ten years. The acoustic parametric source takes advantage of the non-linearity of the medium to generate energy at the difference of two high frequencies. The principal advantage of a parametric source over a conventional transducer is its high resolution capability. The characteristic is a result of its narrow beam width (with no attendant side lobes) and broad bandwidth. The parametric source was designed and tested in the laboratory and also at sea. Laboratory studies showed severe broadening of the parametric beam and reduction of difference-tone pressure on reflection from a smooth air-water surface. This is attributed to the phase reversal that occurs on reflection. The coefficient of amplitude variation at sea was found to be less than 31 at the depth of 20 and 40 ft. and was much higher at 10 ft. depth. The coefficient of amplitude variation was higher for the parametric beam as compared to that of a conventional sound beam at the depths of 20 and 40 ft. The parametric beam had lower coefficient of variation as compared to that of a conventional beam at the depth of 10 ft.
Rights
Copyright is reserved by the copyright owner
URI
http://hdl.handle.net/10945/16555
Collections
  • 1. Thesis and Dissertation Collection, all items

Related items

Showing items related by title, author, creator and subject.

  • Thumbnail

    Characteristics and use of a nonlinear end-fired array for acoustics in air 

    Akar, Ali Onur (Monterey California. Naval Postgraduate School, 2007-03);
    The parametric array exploits two highly collimated ultrasound beams interacting in a given volume producing a single beam with very high directivity and almost no side lobes. The high directivity of the difference frequency ...
  • Thumbnail

    Comparison of in situ aerosol extinction and scattering coefficient measurements made during the Aerosol Intensive Operating Period 

    Strawa, A. W.; Elleman, R.; Hallar, A. G.; Covert, D.; Ricci, K.; Provencal, R.; Owano, T. W.; Jonsson, H.H.; Schmid, B.; Luu, A. P.; Bokarius, K.; Andrews, E. (2006);
    In May 2003, the Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Program sponsored the Aerosol Intensive Operating Period (AIOP) which was conducted over the ARM Climate Research Facility (ACRF) in ...
  • Thumbnail

    The drag and lift characteristics of a cylinder placed near a plane surface 

    Geöktun, Selâahattin (Monterey, California. Naval Postgraduate School, 1975-12);
    Surface pressure, drag and lift coefficients have been experimentally determined for a right circular cylinder located near a plane surface and placed in a cross flow of air. Parametric studies were carried out for ...
NPS Dudley Knox LibraryDUDLEY KNOX LIBRARY
Feedback

411 Dyer Rd. Bldg. 339
Monterey, CA 93943
circdesk@nps.edu
(831) 656-2947
DSN 756-2947

    Federal Depository Library      


Start Your Research

Research Guides
Academic Writing
Ask a Librarian
Copyright at NPS
Graduate Writing Center
How to Cite
Library Liaisons
Research Tools
Thesis Processing Office

Find & Download

Databases List
Articles, Books & More
NPS Theses
NPS Faculty Publications: Calhoun
Journal Titles
Course Reserves

Use the Library

My Accounts
Request Article or Book
Borrow, Renew, Return
Tech Help
Remote Access
Workshops & Tours

For Faculty & Researchers
For International Students
For Alumni

Print, Copy, Scan, Fax
Rooms & Study Spaces
Floor Map
Computers & Software
Adapters, Lockers & More

Collections

NPS Archive: Calhoun
Restricted Resources
Special Collections & Archives
Federal Depository
Homeland Security Digital Library

About

Hours
Library Staff
About Us
Special Exhibits
Policies
Our Affiliates
Visit Us

NPS-Licensed Resources—Terms & Conditions
Copyright Notice

Naval Postgraduate School

Naval Postgraduate School
1 University Circle, Monterey, CA 93943
Driving Directions | Campus Map

This is an official U.S. Navy Website |  Please read our Privacy Policy Notice  |  FOIA |  Section 508 |  No FEAR Act |  Whistleblower Protection |  Copyright and Accessibility |  Contact Webmaster

Export search results

The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

A logged-in user can export up to 15000 items. If you're not logged in, you can export no more than 500 items.

To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.