Figure 2.

Behavioral audiograms (solid lines) for the domestic mouse, Norway rat, rabbit, and human. Audigram based upon eyeblink conditioning (dashed line) in the rabbit. The frequency of the auditory CS used across the majority of eyeblink conditioning studies is marked (asterisks). However, the importance of optimizing the auditory stimulus for each species is highlighted in studies in mice where the CS that has been used is near the bottom of the audible range for this species. Audiograms derived from: the domestic mouse (Koay et al., 2002), the Norway rat (Heffner et al., 1994), the rabbit (Heffner and Masterton, 1980; Martin et al., 1980), and the human (Kojima, 1990; Jackson et al., 1999).