Abstract
This study investigated intensive differential sensitivity for bands of noise as a function of center frequency of the band and sensation level. Eleven untrained subjects and three trained subjects participated, using the method of limits. Results showed that differential thresholds for the low octave band (127–255 cps) of noise were larger than those for a middle octave band (1040–2080 cps) and high octave band (4080–8160 cps) of noise. The middle and high bands in turn yielded differential thresholds that were larger than those for a wide band noise. Increasing the sensation level served to increase differential sensitivity for all bands, especially at low sensation levels. The size of the differential thresholds for the octave noise bands were similar to those obtained for pure tones whose frequencies approximated the center frequency of the noise band. Comparison of the differential thresholds for wide band noise to those obtained by other investigators showed close agreement.
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