IN THE 1965 progress report on medical audiology we reviewed an article by Burke et al,1 "Variability of Threshold Shift in SAL Technique." They reported great variability in the shift of pure tone thresholds of patients with normal hearing when premeasured white noise was applied to the forehead. They felt that this variability precluded the use of sensorineural acuity level (SAL) technique as a replacement for conventional bone-conduction testing. Jerger and Jerger2 challenged this logic by pointing out that
... the norms for... conventional air-conduction and bone-conduction audiometry are derived from data with a very similar "variability".. If one concludes that this variability is sufficient to preclude the use of SAL for precise diagnostic audiometry, then clearly one must reject conventional air-conduction and bone-conduction audiometry on the same grounds.
Rudmose, according to a letter, Dec 15, 1965, argued the same point and also pointed out that the SAL technique
SATALOFF J, VASSALLO L. Medical Audiology. Arch Otolaryngol. 1966;84(5):587–592. doi:10.1001/archotol.1966.00760030589028
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