Abstract
Over a wide range of sound levels, there exists a series of trading relations between time (t) and intensity (I) for equal-loudness for bursts of white noise [Miller, J. Acoust. Soc. Amer. 20, 160–70 (1948)]. Despite this trading relation, a listener may well be able to discriminate between different I⋅t combinations, to which he assigns equal loudness. In a four-interval forced-choice test, three auditory pulse trains were presented at one I⋅n (number) combination; one train consisted of a different I⋅n combination. Three equivalent relations were studied as the n1:n2 ratio was varied: I1 = I2; I1n1 = I2n2; and I1n12 = I2n22. The range for time-intensity forced-choice equivalence is considerably smaller than that reported for the time-intensity interaction for equal loudness.
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