Fig. 3.
Top: A short-term training program (LACE) resulted in gains in speech-in-noise perception ability both immediately after concluding the program (test 2) and six months later (test 3). P values are test 2 vs. test 1 and test 3 vs. test 1 for trained group. Control group did not significantly improve. Bottom: Magnitude of spectral encoding of speech fundamental frequency and second harmonic was greater post-training for the experimental group (left) and the extent of the increase correlated with the improvement in a speech-in-noise measure (right).