Examples of natural and experimental female signals played-back to pups.

f11nat and f11synt: natural and synthetic control signals of female f11. f9synt: synthetic control of female f9; f9wam: synthetic control signal without amplitude modulation; f9wfm: synthetic control signal without frequency modulation; f9sort: synthetic control signal with amplitude level of each harmonic randomly changed; f9l75 & f9l300: synthetic control signal linearly shifted upwards by 75 Hz and 300 Hz respectively; f9a75: synthetic control signal with fundamental frequency shifted upwards by 75 Hz and harmonic series rebuilt. (ZIP)