tonal tonal a sound consisting of a single frequency. Related Articles: Bearded SealDetection Threshold in Animal HearingPygmy Blue WhaleGroup-specific VocalizationsHow is sound used to reduce vessel strikes?Acoustic Masking in MammalsBryde’s WhaleHarbor SealLeopard SealAutonomous Surface Vehicles Holly Morin2022-01-07T11:41:11-05:00