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Reply to Mr. Gordon
Thanks to Mr. Gordon's perspicuity, he has called to our attention three or four points of information that need clarification. We shall consider his observations in the sequence set forth in his correspondence. Therefore, our answers are as follows:
1. In Fig 2, the continuous-tone thresholds did not cross the interrupted-tone thresholds at any point, even though the threshold traces did coincide in the frequency region around 2,000 Hz. It is only an optical illusion that seems to indicate a crossing; so, there was not a "type V Bekesy (Jerger) above 2,000 Hz in Fig 2." Mr. Gordon's additional point about a discrepancy between two thresholds at 2,000 Hz (one determined by audiometry using manual technic, the other by automatic audiometry) requires a lengthier explanation, prefaced with some additional information.
During Bekesy audiometry, white noise at a level of 75 dB SPL re.0002 μbar was invariably delivered to the nontest