First Advisor

James F. Maurer

Term of Graduation

Spring 1980

Date of Publication

5-9-1980

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Speech Communication: Speech and Hearing Sciences

Department

Speech Communication

Language

English

Subjects

Noise control

DOI

10.15760/etd.2956

Physical Description

1 online resource (viii, 43 pages)

Abstract

The purpose of this study was to investigate the feasibility of measuring the insertion loss (attenuation) provided by cannon earplugs using the Knowles Electronics Manikin for Acoustic Research. Five earplugs were tested in a 90 dB sound field at discrete frequencies matching those published by NIOSH. Each plug was exposed to 10 trials. Results indicate an approximation between values obtained in the study and NIOSH published values. Some consistent differences tend to indicate that NIOSH values may overrate low frequency attenuation.

Rights

In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

Comments

A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Speech Communication with emphasis in Speech Pathology and Audiology.

If you are the rightful copyright holder of this dissertation or thesis and wish to have it removed from the Open Access Collection, please submit a request to pdxscholar@pdx.edu and include clear identification of the work, preferably with URL.

Persistent Identifier

https://archives.pdx.edu/ds/psu/17609

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