Abstract
The use of direct magnitude estimation (ME) of loudness has recently been very useful in the study of auditory adaptation effects. The current study proposed to compare ME loudness adaptation to the widely studied adaptation effects measured by the classic simultaneous dichotic loudness balance technique. Three conditions were administered to each of 18 SS at 60 dB SPL, 1000 Hz. Condition I consisted of 7 min of the stimulus with ME judgments taken at the beginning and end. Condition II consisted of the SDLB procedure with binaural pretest balance values determined in dB, 7 min of monaural stimulation in the second stage, and dB balance determined binaurally in the final stage. ME loudness values were also taken at each stage. Condition III consisted of a parallel to condition II, but without the dB adjustments or balances that are normally found in SDLB procedures. Only ME judgments were taken during the three stages of condition III. Results of ten dependent measures were subject to factor analysis, with four factors identified. These independent factors appear to account for the reported disagreements between ME loudness adaptation and SDLB related effects.
Published Version
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