Two independent series of measurements of normal auditory threshold have been carried out with fixed‐frequency self‐recording audiometers. The results are in close‐agreement with each other, but yield threshold levels that are distinctly more acute than the International Stanford reference levels (ISO‐R,389; 1964), the exact difference varying somewhat according to different methods of application of the standard to TDH‐39; MX‐41‐AR earphones. Possible reasons for the more‐acute thresholds are discussed.