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

An investigation of the performance of a ribbon and small planar magnetic transducer, made for use in air, as an underwater acoustic velocity sensor

Thumbnail
Download
Icon16Sep_Kwon_Honorato.pdf (8.906Mb)
Download Record
Download to EndNote/RefMan (RIS)
Download to BibTex
Author
Kwon, YoungWoo
Honorato, Javier
Date
2016-09
Advisor
Kapolka, Daphne
Baker, Steven R.
Metadata
Show full item record
Abstract
The use of vector sensors in sonar receiving array applications is an area of active investigation by the U.S. Navy. A vector sensor combines the outputs of a monopolar (pressure) sensor co-located with one or more orthogonal dipolar (velocity or, more commonly, pressure-gradient) sensors to achieve a modest (5–6 dB) amount of directivity at a single point. The directivity of an array formed using such sensors is also modestly improved by the same amount. More importantly, though, the azimuthal angle ambiguity that occurs in the beam pattern of a line array of point pressure sensors is removed by employing vector sensors instead. This thesis describes an investigation into the underwater use of a pressure-gradient transducer technology that has been employed in airborne acoustic applications for many years (mostly as a source), but, to our knowledge, has heretofore never been employed under water. The devices examined include planar-magnetic and true ribbon transducers. The planar-magnetic transducer is very closely related to what was developed first (i.e., the true magnetic ribbon transducer). The same as an ordinary magnetic loudspeaker or microphone, both the planar-magnetic and true ribbon transducers employ a mutually orthogonal electrical conductor, magnetic field, and axis of motion of a diaphragm. We present the results of measurements made both in air and water of the transmitting and receiving responses of a planar-magnetic and a true ribbon transducer. We also present a procedure for the free-field reciprocity calibration of a pressure-gradient transducer.
Rights
Copyright is reserved by the copyright owner.
URI
http://hdl.handle.net/10945/50571
Collections
  • 1. Thesis and Dissertation Collection, all items

Related items

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

  • Thumbnail

    Continued investigation of the use of passive resonators to improve the performance of a low frequency sonar transducer. 

    Sanders, David E. (Monterey, California. Naval Postgraduate School, 1991-12);
    In an earlier thesis, Ellsworth showed that the radiated power output (quantified by the gain in radiation resistance presented to the transducer) and directivity of a compact underwater transducer can be significantly ...
  • Thumbnail

    On the use of sympathetic resonators to improve low frequency transducer performance 

    Ellsworth, John Merle (Monterey, California: Naval Postgraduate School, 1990-09);
    The achievable gain in the radiation resistance and directivity of a low frequency underwater transducer due to the presence of an array of sympathetic resonators was analyzed. The resonators were all taken to be air ...
  • Thumbnail

    On the use of sympathetic resonators to improve low-frequency underwater transducer performance 

    Baker, Steven R.; Ellsworth, John Merle (Monterey, California. Naval Postgraduate School, 1991-10); NPS-PH-92-002
    The achievable gain in the radiation resistance and directivity of a low-frequency underwater transducer due to the presence of an array of sympathetic resonators has been analyzed. The resonators were all taken to be air ...
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.