Biomedical subjects

W A Cooper

Publications and source records attributed to W A Cooper.

40 records · Page 3Linked to original sources

PubMedDate not supplied

Pure tone delayed auditory feedback: effect of instructions.

This study compared the effect of instructions to the subject upon key tapping performance with pure-tone delayed auditory feedback. One set of instructions stressed the importance of maintaining tapping rate whereas a second set emphasized consistency of the pattern. A third set stressed rate and pattern equality. The results lead to the recommendation that instructions stress equally both rate and pattern consistency.

Acoustic Stimulation↗

PubMedDate not supplied

Filter effect of earmold venting: comparison of electroacoustic and psychoacoustic methods of evaluation.

The filter effect of venting an earmold was evaluated by measuring the coupler-acoustic and threshold responses to open versus closed earmolds. In the coupler-acoustic technique the effect of venting was determined by measuring the output of the experimental earmolds seated on a modified 2-cc coupler with a specified signal impressed upon the earphone. The real ear threshold technique called for the determination of threshold by five listeners for the same earphone-earmold system. The data indicated that the difference between the coupler and threshold measures were of the same order of magnitude as the difference seen by other investigators reporting coupler and real ear-probe tube microphone measures. It was concluded that the threshold technique provides the same general description of the effects of venting an earmold as does the probe tube technique and should thus provide a useful method for determination of the filter effects produced by the venting of an earmold.

Auditory Threshold↗

PubMedDate not supplied

Pure tone delayed auditory feedback. Effect of hearing loss on disruption of tapping performance.

Pure tone delayed auditory feedback audiometry was administered to 20 veterans with normal hearing at 1 kHz and a sensorineural hearing loss associated with noise exposure at 4 kHz. Absolute and relative time errors as well as pattern errors were analyzed for the group and for each individual. Mean data showed no difference between error measures for the two frequencies. However, individual data revealed that errors in the subjects' performance occurred at a level slightly closer to threshold at the frequency with the hearing loss (4 kHz) than at the frequency at which hearing was normal (1 kHz).

Adult↗

PubMedDate not supplied

Pure tone delayed auditory feedback: development of criteria of performance deterioration.

Delayed auditory feedback audiometry, employing pure tones and a keytapping task, was administered at sensation levels from -10 to +50 dB to a sample of the general adult population. Absolute and relative time error as well as pattern error criteria were established on the basis of the -10-dB performances. Ninety percent of the subjects demonstrated tapping errors at sensation levels within 10 dB of auditory threshold.

Adolescent↗