• Results of conventional audiological procedures, lengthened off-time Békésy, and electrodermal response audiometry are compared with pure-tone delayed auditory feedback procedures for 100 subjects referred for medical-legal audiological evaluation. Specific attention is given to a new economical prototype unit for pure-tone delayed auditory feedback, to the comparison of results of special test procedures, and to the necessity for a battery of tests for the audiological assessment of the nonorganic hearing loss population.