1. A map of periodicity orthogonal to frequency representation in the cat auditory cortex.  Gerald Langner, Ben Godde, and Hubert R. Dinse Examples of auditory stimuli.
pure tones
Pure tone frequencies are: Hz Hz Hz Hz Hz
harmonic sounds
Harmonic sounds are composed of harmonics of fundamental frequencies between 50 and 1200 Hz. All harmonic sounds have an upper cut-off frequency of 4.8 kHz. Lower cut-off frequencies are 0.4, 0.8, or 1.6 kHz.
cut-off frequency 0.4 kHz, fundamental frequency: Hz Hz Hz Hz
cut-off frequency, 0.8 kHz, fundamental frequency: Hz Hz Hz Hz Hz Hz
cut-off frequency 1.6 kHz, fundamental frequency: Hz Hz Hz Hz Hz Hz
sinusoidal amplitude modulations
Sinusoidal amplitude modulations have carrier frequencies of 0.8, 1.6, and 3.2 kHz and are 100% modulated by frequencies between 50 and 800 Hz, with the exception of sounds with the ratio of carrier and modulation frequency smaller than 4; they were excluded because in these cases the ear is able to resolve the sidebands of the amplitude modulations.
carrier frequency 0.8 kHz, modulation frequency: Hz Hz Hz
carrier frequency 1.6 kHz, modulation frequency: Hz Hz Hz Hz
carrier frequency 3.2 kHz, modulation frequency: Hz Hz Hz Hz Hz
band-pass filtered noise sounds
The band-pass filtered white noise have centre frequencies between 200 Hz and 3200 Hz and bandwidths increasing in proportion from 50 to 800 Hz.
Band pass filtered noise: Hz Hz Hz Hz Hz