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dc.contributor.advisorLankford, James E.en_US
dc.contributor.authorSwim, Kristine M.en_US
dc.date.accessioned2016-02-05T14:48:40Z
dc.date.available2016-02-05T14:48:40Z
dc.date.issued1993
dc.identifier.urihttp://commons.lib.niu.edu/handle/10843/15300
dc.descriptionIncludes bibliographical references (pages [45]-48)en_US
dc.description.abstractHearing thresholds were assessed using a standard supra-aural earphone (SSE) and a muffed insert earphone (MIE) in an environment of specially shaped noise. Eleven women with normal hearing sensitivity were the subjects of this project and were evaluated under four test conditions: supra-aural earphone in quiet, supraaural earphone in noise, muffed insert earphone in quiet, muffed insert earphone in noise. Results of an analysis of variance revealed significantly higher thresholds with the SSE compared to the MIE in the noise test condition. Essentially no threshold shift occurred with the muffed insert earphone in any condition. It was concluded that the MIE is more appropriate than the SSE for testing hearing sensitivity in the presence of moderate amounts of ambient noise. Hearing levels can be accurately assessed using the MIE system in levels of noise that are equal to OSHA maximum permissible levels. Subjective comfort ratings of each earphone revealed no difference between the two systems.en_US
dc.format.extent70 pagesen_US
dc.language.isoengen_US
dc.publisherNorthern Illinois Universityen_US
dc.rightsNIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.en_US
dc.subject.lcshHearing levelsen_US
dc.subject.lcshNoise control--Equipment and suppliesen_US
dc.subject.lcshDeafness--Preventionen_US
dc.subject.lcshNoise barriers--Testingen_US
dc.titleThe effects of noise on thresholds obtained with a supra-aural earphone and a muffed insert earphoneen_US
dc.type.genreDissertation/Thesisen_US
dc.typeTexten_US
dc.contributor.departmentDepartment of Communicative Disordersen_US
dc.description.degreeM.A. (Master of Arts)en_US


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