Fig. 3.

Reduced female response to low male songs in noise. Females were played the lowest and highest song type from their mate's repertoire on days with and without experimental noise exposure. Shown is the number of trials during which females emerged from their nest box as the response measure. Under noisy conditions, female response to song changed for the low-frequency song types (GLMM; low noise vs. low control: ***P < 0.001) but not for the high-frequency song types (P = 0.39). This finding resulted in high-frequency songs being more effective compared with low-frequency songs in noise (*P = 0.044). Females had no prior experience with noise and were adjusted to noise conditions for ∼24 h before the start of the playback.