Abstract
Loudness judgments are especially sensitive to experimentally induced biases. By using a method derived from studies of visual intensity, it was found possible to obtain loudness estimates free from known biasing factors. Judgments of 50% loudness corresponded to 25% stimulus intensity (6-dB attenuation) for 1000-Hz tones from 42 through 92 dB, and for tones from 250 through 8000 Hz presented at moderate intensity. These results agree with other data supporting the physical correlate theory of sensory intensity. It is suggested that the sone scale of loudness reflects the influence of known experimental biases and hence does not represent a fundamental relation between stimulus and sensation.
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