09 April 2022 : Review article
A Review of the Neurobiological Mechanisms that Distinguish Between Loudness Recruitment and Hyperacusis
Lin Shi1EF, Rui Zhao1C, Xinxin Li1C, Wei Sun2A*, Xiuli Liu1ADDOI: 10.12659/MSM.936373
Med Sci Monit 2022; 28:e936373

Figure 1 Loudness models for normal subjects, patients with loudness recruitment, and patients with hyperacusis (Cox, 1997). The maximum discomfort threshold for a normal person is 100 dB HL. Patients with loudness recruitment have a largely unchanged maximum discomfort threshold, although they often have sensorineural deafness, while some patients with hyperacusis have an increased hearing threshold, the maximum discomfort threshold falls to 70–80 dB instead, thus the range of hearing tolerance is significantly reduced.