Abstract
The effects of fixed frequency tracing orders at 4000 cps upon thresholds in quiet, in noise and in recovery after noise exposure were determined on a Bekesy audiometer with 32 normal hearing adult subjects. The results showed that:1. In the pulsed/continuous tracing order in quiet the difference in threshold sensitivity was non-significant. Conversely, in the continuous/pulsed tracing order in quiet the pulsed trace threshold was significantly more acute.2. Order effects were present also in the noise tracings. Post-rest pulsed tones were more acute than pre-rest continuous tones. However, the converse was not true.3. Tracing order effects were operating in the recovery thresholds. Postrest pulsed recovery thresholds were more acute than pre-rest continuous recovery thresholds. Also, initial thresholds in quiet appeared to have a significant effect on subsequent recovery thresholds for continuous tone tracings. This finding did not obtain for pulskd tones.4. When initial thresholds in quiet were compared...
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