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

Characterization of the MEMS directional sound sensor fabricated using the SOIMUMPs process

Thumbnail
Download
Icon08Jun_Dritsas.pdf (1.183Mb)
Download Record
Download to EndNote/RefMan (RIS)
Download to BibTex
Author
Dritsas, Antonios.
Date
2008-06
Advisor
Karunasiri, Gamani
Koyak, Robert
Metadata
Show full item record
Abstract
A micro-electro-mechanical system (MEMS) based directional sound sensor performance is characterized. The operation of directional sound sensor is based on the hearing organ of Ormia ochracea fly, which uses coupled bars hinged at the center to achieve the directional sound sensing. The MEMS sensor design considered in this thesis is fabricated using a process by which the sensor has two resonant vibrational modes: rocking and bending. The sensor is simulated using finite element analysis and tested by actuating the sensor using a sound stimulus. An analysis is undertaken to describe, in mathematical terms, the relationship between the sensor's amplitude of vibration and various parameters such as the angle of incidence, frequency and the intensity of sound. The experimentally-observed vibrational frequencies are found to be in good agreement with the simulated data, which supports the use of the simulation in future sensor development. The observed amplitudes of vibration are significantly greater than those of sensors fabricated with the process used in previous studies. The relationship between the amplitude of vibration and the incident angle are found to agree with the theoretical predictions. The results indicate that it is possible to fabricate miniature sound sensors that mimic the fly's hearing system.
Collections
  • 1. Thesis and Dissertation Collection, all items

Related items

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

  • Thumbnail

    MEMS polymumps-based miniature microphone for directional sound sensing 

    Shivok, Timothy J. (Monterey, California. Naval Postgraduate School, 2007-09);
    A miniature directional sound sensor was fabricated using micro-electromechanical system (MEMS) technology based on the operational principle of Ormia ochracea fly's hearing organ. The fly uses coupled bars hinged at the ...
  • Icon

    MEMS Underwater Directional Acoustic Sensor in Near Neutral Buoyancy Configuration 

    Alves, Fabio; Park, Jaehyun; McCarty, Leland; Rabelo, Renato; Karunasiri, Gamani (MDPI, 2022);
    A MEMS directional acoustic sensor housed in an air cavity and operated underwater in a near-neutral buoyancy configuration is demonstrated. The sensor consists of two wings connected by a bridge and attached to a substrate ...
  • Thumbnail

    Designing an electronic readout for a directional micro electrical-mechanical (MEMS) sound sensor 

    Lim, Choon Wee. (Monterey, California. Naval Postgraduate School, 2011-12);
    Locating sound sources has been of interest to the military, especially in locating sniper fire in an unconventional operational theater. Today, there are such systems to localize snipers, but they are bulky, heavy and do ...
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.