Date of Award


Document Type


Degree Name

Master of Science (MS)


Communication Sciences & Disorders


The purpose of this study was to determine if threshold change occurred during menses and two post menses time periods. Sixteen female subjects, using the Bekesy tracing method, determined thresholds for 1 KHz and 4 KHz for signal durations of 2 msec, 20 msec, and 500 msec.

The results indicated that there was no significant difference (p>.05) for the thresholds of 1 KHz and 4 KHz at any duration over the three test times. However, there was a significant second degree trend present at 1 KHz for the 20 msec signal.

A comparison was made between the thresholds obtained by nine subjects who were using an oral contraceptive and seven subjects who were not. A significant difference (p <.05) between the groups was found at 4 KHz for the 2 msec signal duration in that the group using oral contraceptives obtained threshold at a lower intensity than did the group not using oral contraceptives.

Comparison of the thresholds and the slope of integration obtained in this study was in agreement with previous investigators.