Importantly, the change is persistent, in that it lasts throughout the animal's life, and specific, in that the same exposure outside of that period causes no lasting change in the tonotopy of A1.
重要的是，变化是持续的，因为它持续整个动物的生命，具体而言，在该时期之外的同样的暴露不会导致A1的tonotopy持续变化。