published_or_final_version / Speech and Hearing Sciences / Master / Master of Science in Audiology

Results of a national survey on sound field usage and sound field calibration are presented. The purposes of this study are: (1) to describe and analyze sound field stimuli, sound field test conditions, and sound field calibration procedures currently employed by audiologists nationwide, and (2) to investigate the extent of agreement between current practice and suggested practice from the current literature. Respondents to the survey were 418 ASHA certified audiologists, who answered questions on demographic variables, sound field testing conditions, and sound field calibration procedures. Eighty-one percent of the respondents use sound field audiometry as part of their audiological practice. Demographic characteristics of the respondents indicate that they were representative of the population of ASHA certified audiologists. Most respondents use two loudspeakers for sound field testing and use warbled pure tones for the stimuli. Forty-two different models of audiometers are in use, although three models account for over one-half of the responses. Electroacoustic calibration of the sound field stimuli is done most often by an equipment technician, and only a small percentage of the respondents knew how the calibration was done. No pattern of significant interactions was found among the calibration methods, sound field test conditions, and demographic variables of the subjects. Results show a lack of standardization among sound field test rooms, great diversity in the stimuli used for sound field testing, and inconsistent calibration methods. Results therefore indicate the need for national standards and improved pre-service and in-service training in sound field testing and sound field calibration techniques. Recommendations for clinical practice in sound field testing and sound field calibration are proposed.

Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 130-135). Available also in a digital version from Dissertation Abstracts.

Thesis (Ph. D.)--University of Queensland, 2001. / Includes bibliographical references.

No description available.

Five commonly used children's tests of auditory discrimination were administered to thirty normal hearing six year old children. The following tests were used: Goldman-Fristoe-Woodcock Test of Auditory Discrimination (GFWTAD), Wepman Auditory Discrimination Test (WADT), Boston University Speech Sound Discrimination Picture Test (Boston), Discrimination by Identification of Pictures (DIP), and the Phonetically Balanced Kindergarten Lists (PBK). These tests are assumed to all be testing auditory discrimination; however, each test has a number of variables such as: guessing factor resulting from the number of pictures presented as visual-stimuli, discrimination of sounds based on “same” and “different” concepts versus picture identification techniques, understanding of the task, and familiarity with the vocabulary. Each child was administered a pure tone air conduction screening test with tympanograms and/or bone conduction testing to eliminate those children having conductive components.It appeared that no correlation existed between the tests and that when testing for intercorrelation between the tests, several test pairs were inversely related. Results of the tests indicated that there was essentially no difference between the scores of male subjects and the scores of female subjects. The effect of order of presentation revealed a negative correlation on the WADT and the Boston, with no effect on the DIP or GFWTAD.The implications of this investigation was that further study may be necessary since very little research has been performed in this area.

Thesis (M.Sc.)--University of Hong Kong, 2008. / Includes bibliographical references (p. 41-43).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1962. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 57-59).

Thesis (B.Sc)--University of Hong Kong, 2007. / "A dissertation submitted in partial fulfilment of the requirements for the Bachelor of Science (Speech and Hearing Sciences), The University of Hong Kong, June 30, 2007." Includes bibliographical references (p. 26-28). Also available in print.

Thesis (B.Sc)--University of Hong Kong, 2007. / "A dissertation submitted in partial fulfilment of the requirements for the Bachelor of Science (Speech and Hearing Sciences), The University of Hong Kong, June 30, 2007." Includes bibliographical references (p. 27-30). Also available in print.