The power of various relatively unknown parameters of stress [1, 2] was investigated. They were either derived from the latter, or from the physiological process of phonation. Two stimulus Afrikaans words in and out of focal accented sentence position were read by three Afrikaans female participants. The stressed and unstressed vowel /A/ was investigated in the two contexts. Effect sizes and multiple regression analysis results were used in determining the descriptive and explanatory power of the parameters as to the acoustic correlates of stress. The results substantiate the groundbreaking work of [1, 2] in this regard, but in some instances they disprove these. Many of the parameters proved to be quite powerful constructs, in some cases surpassing the known ones in strength. The successful derivation of such parameters from the physiological basis of the phonation process is demonstrated. Special attention is paid as to the description of vowel reduction.
Bibliographic reference. Wissing, Daan (2007): "More on acoustic correlates of stress", In INTERSPEECH-2007, 1002-1005.