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A reference paper on auditory acuity testing is presented, designed to help the beginning worker reach a decision as to which test or tests he should institute, and to provide a body of data against which the experienced worker may check his own procedures. Data is summarized from this and other laboratories bearing on the relative usability of the free voice and the pure tone audiometer as tests of auditory acuity. It is found the consensus of most studios that a careful voice test and pure tone audiometry through the speech range (512-2048 c.p.s.) are intimately connected and measure almost the same auditory function. A comparison of six studios reveals the relationship between the two tests to be a straight-line function. Statements cited to the effect that speech and audiometry are not related are definitely contraverted. (Author)