"Hearing thresholds" refers to the quietest sounds a person can hear in different frequencies or pitches. It helps measure the level of hearing sensitivity of an individual. Full definition
«The recovery of hair cells brought the treated ears to between 50 % and 80 % of their original hearing thresholds,» says Raphael. (newscientist.com)
Southall et al (2000 JASA)-- Masking in three pinnipeds: Underwater, low - frequency critical ratios Behavioral techniques were used to determine underwater masked hearing thresholds for a northern elephant seal (Mirounga angustirostris), a harbor seal (Phoca vitulina), and a California sea lion (Zalophus californianus). (sea-inc.net)
This intervention leads to a reversible hearing loss, i.e. rise in the hearing threshold of about 50 decibels,» says Kopp - Scheinpflug. (sciencedaily.com)