Biomedical subjects

W R Thurlow

Publications and source records attributed to W R Thurlow.

3 recordsLinked to original sources

PubMed1975

Localization of two noise sources overlapping in time.

The accuracy of localization of two independent, wide-band noise sources, overlapping in time, was measured. Subjects given preliminary practice had little difficulty in localizing when sources separated by 55 degrees were located in front of them or in back of them, with one source 10 degrees from the midline. But when sources were at the side of the subject, perception that there were two sources present tended to improve significantly as time between onset of the sounds was increased to 100 msec. Once a sound was perceived to be present, it was localized with fairly high accuracy.

Acoustic Stimulation↗

PubMedDate not supplied

Understanding continuity effects with complex stimuli.

When a low-intensity stimulus A is alternated in time with a high-intensity stimulus B of relatively short duration, stimulus A is heard as continuous. This "continuity" effect is shown to occur even when the B stimulus is a series of sharp pulses at one rate and the A stimulus is a series of pulses at another rate which must produce a very different neural temporal pattern. Simple substitution models of the continuity effect are thus shown to be inadequate. A model is presented to make various types of continuity effects more understandable.

Adult↗

PubMedDate not supplied

Further study of existence regions for the "ventriloquism effect".

The "ventriloquism effect" refers to the perception of speech sounds as coming from a direction other than their true direction, due to the influence of visual stimuli from an apparent speaker. In these experiments, the ventriloquism effect was observed for conditions in which the subject turned his eyes 30 degrees to watch a speaker on a TV monitor. It was found that (1) the ventriloquism effect could be obtained for (hidden) auditory sources 20-30 degrees from the position of the TV speaker; (2) a strong ventriloquism effect could be obtained for an auditory stimulus at an angel of 150 degrees right of the subject's straight ahead when the TV source (toward which the subject's gaze was directed) was at 30 degrees right of straight ahead. Lesser effects were obtained for sound sources at 130 and 170 degrees right of the subject's straight ahead.

Cues↗