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This thesis studied the relationship between preference judgments and discrimination scores obtained using flat and selective amplification. Sixteen subjects with sloping sensorineural hearing losses listened to tapes of PB words and sentences, which had been recorded through flat and selective response hearing aids. Preference judgments and discrimination scores were obtained for each subject.The results of this study indicate that individuals with sloping sensorineural hearing losses do understand speech best with selective amplification. The results also indicate that there is no significant difference between preference judgments for flat or selective amplification. However, the correlation between the preference judgments and the type of amplification best for understanding speech is not very high.

Thesis (M.S.)--University of Wisconsin--Madison, 1971. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis--Wisconsin. / Vita. Includes bibliographical references (leaves 204-211).

Thesis--Wisconsin. / Includes bibliographical references (leaves 64-69).

Thesis (M.S.)--West Virginia University, 2007. / Title from document title page. Document formatted into pages; contains vii, 43 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 42-43).

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No description available.

Automated smartphone-based threshold audiometry has the potential to provide affordable audiometric services in underserved contexts where adequate resources and infrastructure are lacking. This study investigated the validity of the threshold version (hearTest) of the hearScreen™ smartphone-based application using inexpensive smartphones (Android OS) and calibrated supra-aural headphones. A repeated-measures, within-subject, study design was employed, comparing automated smartphone audiometry air conduction thresholds (0.5 to 8 kHz) to conventional audiometry thresholds. A total of 95 participants, with varying degrees of hearing sensitivity, were included in the study. 30 participants were adults, with known bilateral hearing losses of varying degrees (mean age of 59 years, 21.8 SD; 56.7% female). 65 participants were adolescents (mean age of 16.5 years, 1.2 SD; 70.8% female), of which 61 had normal hearing and 4 had mild hearing losses. Within the adult sample, 70.6% of thresholds obtained through smartphone and conventional audiometry corresponded within 5 dB. There was no significant difference between smartphone (6.75 min average, 1.5 SD) and conventional audiometry test duration (6.65 min average, 2.5 SD). Within the adolescent sample, 84.7% of audiometry thresholds obtained at 0.5, 2 and 4 kHz corresponded within 5 dB. At 1 kHz 79.3% of the thresholds differed by 10 dB or less. There was a significant difference (p&#060.01) between smartphone (7.09 min, 1.2 SD) and conventional audiometry test duration (3.23 min, 0.6 SD). The hearTest application using calibrated supra-aural headphones provided valid air conduction hearing thresholds. Therefore, it is evident that using inexpensive smartphones with calibrated headphones provides a cost-effective way to provide access to threshold air conduction audiometry. / Dissertation (M Communication Pathology)--University of Pretoria, 2016. / Speech-Language Pathology and Audiology / M Communication Pathology / Unrestricted

Spontaneous otoacoustic emissions (SOAEs) are narrowband continuous signals that can be recorded from the ear canals of humans in the absence of external stimulation. SOAEs have been detected in 30 to 50% of individuals whose hearing is within normal limits. They are believed to originate in the cochlea but the mechanism by which they are produced remains unknown. It has not been determined if SOAEs are an indication of subtle abnormality in the cochlea or if they are the result of an auditory system that is functioning normally. Most investigators agree, however, that an active source of energy within the cochlea is required for the generation of SOAEs. The objective of this study was to describe the effects of SOAEs on behavioral sensitivity and frequency selectivity. Eight subjects with SOAEs were evaluated. Sensitivity was measured using a Bekesy tracking method to obtain thresholds at 30-Hz intervals. Microstructure audiograms were obtained in this manner from the frequency region surrounding the SOAE and from the same frequency region in the other ear where no SOAE was detected. Frequency selectivity was assessed using a Bekesy tracking method to obtain psychophysical tuning curves (PTCs) from frequency regions with and without SOAEs. SOAEs were found to be associated consistently with threshold minima (regions of increased sensitivity) on the microstructure audiograms, although not all threshold minima corresponded to SOAE frequencies. PTCs centered at SOAE frequencies were characterized by higher Q10 values than PTCs from the same frequency region in the other ear or from a higher frequency region in the same ear. The high and low frequency slopes were not found to differ significantly when PTCs from frequency regions with and without SOAEs were compared. These results suggest that the differences between PTCs obtained from frequency regions with and without SOAES are restricted to the tips of the PTCs. Complex interactions among the SOAE, the probe tone, and the masker were thought to be responsible for the enhanced frequency selectivity observed near SOAE frequencies and manifested by higher Q10 values.