Figure 1. Threshold shift at 16 kHz for the four strains of mice. Each graph displays the threshold shift for two groups of mice of the same strain–one exposed to noise and one an unexposed control. B6 are the inbred strain C57BL/6J (Ahl/Ahl). CBA are inbred strain CBA/CaJ (+/+). B6xCBA is the hybrid strain between C57BL/6J and CBA/CaJ (Ahl/+). B6xDBA is the hybrid strain between C57BL/6J and DBA/J (Ahl/Ahl). Redrawn from Erway et al., 1996.