critical ratio critical ratiothe ratio, in decibels, of the signal power to the noise power in a 1-Hz band (centered at the test frequency) required to reliably detect a signal at some predetermined level of correctness Related Articles: Detection Threshold in Animal HearingReference List: Animals and SoundTutorial: Mammals – MaskingAcoustic Masking in Mammals Chris Knowlton2022-01-07T10:25:02-05:00