Postural adjustments produced by moving visual (horizontal optokinetic) patterns.

The effects of horizontal optokinetic stimulation (HOKS) on postural sway were examined in 30 normal subjects aged 20 to 75 years. Fixed-platform posturography was evaluated with the eyes open and closed and during HOKS (20-100 degrees/sec) in the rightward and leftward directions. Forward-backward sway was greater in amplitude than lateral sway under all viewing conditions.

Masking-level difference for spondaic words in 2000-msec bursts of broadband noise.

One protocol developed for the Tonal and Speech Materials for Auditory Perceptual Assessment audio compact disc was the masking-level difference (MLD) for spondaic words in which the words and broadband noise were mixed and recorded at 16 selected signal-to-noise ratios. Four words were recorded at each level. Because it was impossible to monitor the word presentations at negative signal-to-noise ratios, a different paradigm was devised in which the spondaic words were embedded in 2000-msec bursts of noise.

Monocular and Binocular Testing to Improve the Diagnostic Value of Horizontal Optokinetic Nystagmus.

This report describes the effects of unilateral peripheral vestibular lesions on the binocular and monocular optokinetic nystagmus (OKN). Six subjects who had undergone surgical removal of an acoustic neuroma were compared to 14 normal subjects. Stimuli consisted of 15° vertical stripes projected onto a flat screen 1 m from the subject.

Normative data in quiet, broadband noise, and competing message for Northwestern University Auditory Test No. 6 by a female speaker.

Two descriptive experiments were performed on a version of the Northwestern University Auditory Test No. 6 (NU No. 6) recorded by a female speaker that is included on an audio compact disc recently produced by the Department of Veterans Affairs.

Reliability of spontaneous otoacoustic emission suppression tuning curve measures.

The purpose of this investigation was to study the reliability of spontaneous otoacoustic emission (SOAE) suppression tuning curve (STC) measurements. Two repetitions of an SOAE STC, using a 4-dB suppression criterion, were obtained from 5 subjects who exhibited stable SOAE level (SD less than or equal to 1.5 dB) and SOAE frequency (+/- 5 Hz).