question: When should the noise-based speed be used ?
answer: the noise-based speed ( 40:1 ) is higher than the saturation-based speed
turker_answer: The noise-based speed should be used when it ( 40:1 ) is higher than the saturation-based speed .
rule-based: The noise-based speed should be used in the noise-based speed ( 40:1 ) is higher than the saturation-based speed .