Table 2.

Estimates of spectral integration were computed as the maximum single-frequency signal threshold minus the associated multi-frequency signal threshold. The sem is indicated in parentheses. Assuming d^′ is proportional to signal intensity, integration of three independent cues is predicted to be 2.4 dB.

Relative levels based on	Signal condition
	On-signal	Complex
Noise	2.59	3.32
	(0.50)	(0.33)
SAM noise	5.01	3.95
	(0.86)	(0.41)