These demos are from the Acoustical Society of America disc, Tracks 75-79. You will need headphones to listen to these stimuli, as they are binaural.

Legend
Each stimulus is made up of two components: a noise (N) and a tone (T, the signal to detect). Each component may be presented monaurally or binaurally. Subscript indicates the interaural phase difference for that component:
o = binaural, same phase
m = monaural, presented to the left ear only
π = binaural, opposite phase

Expected order of detection thresholds (lower is better):
N_oT_π < N_oT_m < N_oT_o ~ N_mT_m

T_m (no noise, only 500 Hz tone in quiet presented to left ear):

N_mT_m:

N_oT_m:

N_oT_o:

N_oT_π: