Some Possible Attentional Aspects of Post-Stimulus Signal Processing
Richard E. Pastore · The Journal of the Acoustical Society of America · 1973
Some possible attentional aspects of post-stimulus signal processing were investigated in a modified masked-signal detection paradigm. The signal was a 1000-Hz sinusoidal waveform 20 msec in duration and sated at positive zero-crossing of the waveform. The signal was masked by a broad-band (360–3360 Hz) Gaussian noise. The effect of a decrease in the amplitude of the masking noise, when confined to a limited frequency range, was investigated in terms of both the frequency range of the change and the temporal relationship between the offset of the signal observation interval and the onset of the decrease. An immediate decrease in masking noise in frequency regions outside the critical band of the signal decreased detectability.