Semantically Unpredictable Sentences

A standardised method for evaluating speech intelligibility in which listeners are presented with sentences that are grammatically correct but semantically meaningless, such as "A polite art jumps beneath the arms" or "The law that finished shows the boots." Because the sentences lack meaningful context, listeners cannot use semantic prediction to guess words they may have misheard, making SUS a rigorous measure of how clearly a speech system renders individual words. SUS testing is commonly used in text-to-speech evaluation and is particularly relevant for assessing synthesized speech quality for screen reader users who depend on accurate word-level comprehension.