Relations between Factors Governing the Quality of Service
“It would be convenient if the telephone transmission performance of a given speech link could be expressed as a unique value along a unidimensional scale graduated in clearly definable units. Certain rather simple relevant subjective criteria do appear to be unidimensional, such as ‘comparative loudness’ and ‘comparative fitness for a defined purpose’ and much advantage can be taken of these properties. Unfortunately, however, these only enable a particular set of speech links to be ranked according to certain criteria and they do not yield an unequivocal absolute scale which would have universal meaning.”
KeywordsTest Subject Transmission Quality Preference Judgment Auditory Test Speech Level
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