Masters Theses

Abstract

"The purpose of this investigation is to determine the effect of slow steady flow on the reflection and transmission characteristics of acoustic filters.

A standing wave tube and transmission tube apparatus, designed and built by a previous investigator, was modified to accept slow steady flow. Reflection characteristics were determined from measurements made on the inlet side of the filters investigated. These data along with measurements taken with the transmission tube apparatus were used to determine transmission characteristics. The calculations were simplified by terminating the filters anechoically. The filters used in this investigation were an expansion chamber, an automobile type muffler with adjustable elements, and a replacement automobile muffler. Experimentally determined characteristics of the expansion chamber were in good agreement with theoretically determined characteristics. A major conclusion of this investigation is that standing wave measurements can be made in the presence of slow steady flow. Recommendations for future investigations are made"--Abstract, page ii.

Advisor(s)

Gatley, William S.

Committee Member(s)

Koval, Leslie Robert
Davis, Robert L.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering

Sponsor(s)

University of Missouri--Rolla. Mechanical Engineering Department
Ford Motor Company

Publisher

University of Missouri--Rolla

Publication Date

1972

Pagination

viii, 89 pages

Note about bibliography

Includes bibliographical references (pages 86-88).

Rights

© 1972 Thomas Valle Huber, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Acoustic filters
Sound -- Transmission -- Mathematical models
Automobiles -- Motors -- Mufflers -- Acoustic properties

Thesis Number

T 2846

Print OCLC #

6028551

Electronic OCLC #

904549589

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