Speech and Hearing Science Commons^™

High Frequency Pure Tone Audiometry And High Frequency Distortion Product Otoacoustic Emissions: A Correlational Analysis, Kimberly J. Lavoie

Dissertations and Theses

Previous studies show that pure tone thresholds are strongly correlated with distortion product otoacoustic emission amplitudes when evaluating the frequency range from 1 to 8 kHz (Avan & Bonfils, 1993). Little is known about correlations between these two measures at higher frequencies from 9-16 kHz. This study compared pure tone thresholds and distortion product otoacoustic emissions (DPOAEs) in this high frequency range for 29 normal hearing subjects ages 18-30. Pure tone thresholds were obtained at 250-16 kHz and distortion product otoacoustic emissions (DPOAE) 2,211-17,675 were measured in the same ears. DPOAE amplitudes were measured using a constant F1/F2 ratio of …

The Use Of The California Consonant Test And The Northwestern University Auditory Test No. 6 In Hearing Aid Evaluations For Individuals With Precipitous Losses Above 1 Khz, Bradley James Allard

Dissertations and Theses

These two joint-studies used recorded versions of the Northwestern University Auditory Test Number 6 (NU-6) and the California Consonant Test (CCT) in the hearing aid evaluations (HAEs) of 12 male and one female subjects, aged 41 to 87 years. They exhibited precipitous high frequency losses beyond 1 kHz in at least one ear. All subjects were evaluated without amplification and while monaurally aided with two conventional high pass hearing aids. Ten of the subjects were evaluated in multi-talker noise and 11 were tested in quiet. Since the CCT was more heavily weighted than the NU-6 with target phonemes sensitive to …

The Use Of Auditory Brainstem Responses In Determining The Maximum Outputs Of Hearing Aids, Kathryn Jean Merry

Dissertations and Theses

Uncomfortable listening level (UCL) is a behavioral measure which is currently used to set the maximum outputs of hearing aids. This study explored the feasibility of prescribing the maximum outputs of hearing aids by using results obtained from auditory brainstern response (ABR) testing. More specifically, this study compared ABR wave latencies with behaviorally-measured UCLs for a single cycle 3 kHz stimulus in normal-hearing adults.

The Determination Of Normal Bone Conducted Speech Results Utilizing A Radioear B-72 Bone Oscillator, Roger Edwin Lundberg

Dissertations and Theses

The purpose of this study was to establish a normal, bone conducted intensity level for the speech reception threshold (SRT) and obtain a normal performance intensity function by bone conduction from 0 dB SL (threshold) through the maximum output level of the standard audiometer. All bone conducted speech test materials consisted of pre-recorded W-2 spondiac words and NU-6 monosyllabic speech discrimination word lists.

Assessment Of Hearing Sensitivity By Use Of The Acoustic Reflex In The Geriatric Population, Donna Elvira Gilham

Dissertations and Theses

The purpose of this study was to investigate the use of the SPAR test (Sensitivity Prediction by the Acoustic Reflex) on a sample of older adults who professed negative otologic histories. Twenty-seven subjects, ranging in age from sixty-four to eighty-three years of age (54 ears) were ultimately chosen as subjects. A young adult group, ranging in age from eighteen to thirty years of age, with normal audiometric hearing levels served as controls. Reflex threshold levels were obtained using 500 Hz., 1000 Hz., and 2000 Hz. pure tones and noise stimuli. Assessment of hearing loss was calculated on the difference between …

A Comparison Of Two Systems Used In The Electro-Acoustic Evaluation Of Hearing Aids, Sallie Ann Frye

Dissertations and Theses

The purpose of this study is to compare the Fonix Type 5000 Hearing Aid Test Set to the B&K system by testing the same hearing aids with both systems in order to determine whether there are any important differences between the measurements obtained using the two systems. Frequency response has been chosen as the measure on which the comparisons will be made.

Masking Patterns Of High Frequency Pure Tones, Judith Eide Widen

Dissertations and Theses

Previous investigations of masking have established that the action of the masking tone spreads upward in frequency, creating significantly more masking (threshold shift) above the masker frequency than below. It was the purpose of this study to investigate the masking pattern produced by high frequency pure tones, heretofore uninvestigated.

Masking patterns were obtained for nine normal hearing young adults utilizing the method of adjustment. The masking produced by an 11000 Hz pure tone of 40 dB sensation level was measured at three frequencies above and three frequencies below the masker frequency. Analysis of the data revealed a downward spread of …

A Comparison Of Object Dropping And Echoic Vocalizing As Response Modes To Pure Tone Stimuli Among Mentally Retarded Children, Elton L. Stewart

Dissertations and Theses

Mentally retarded children demonstrate an abnormally high incidence of hearing impairment, and many, particularly those with IQs below 40, are difficult for audiologists to test. Consequently, there is great need among this population for investigating response modes and conditioning of responses to auditory stimuli. A review of the literature reveals no studies of echoic vocalization as a conditioned response mode to pure tone stimuli among the retarded.

In this study, a heterogenous sample of 13 moderately and severely retarded children ranging in age from 7 years 7 months to 16 years 3 months were compared on two response modes to …