TABLE I.

Absolute thresholds for the signal (θ) and the precursor levels ($L_{\text{PRE}}$) used in the precursor condition. The precursor levels selected were based on the growth of masking experiment (see text) and resulted in a 10–15 dB shift in quiet threshold.

Subject	θ (dB SPL)	$L_{\text{PRE}}$ (dB SPL)
S1	21.54	50
S2	20.00	50
S3	25.20	50
S4	24.31	40
S5	22.24	30
S6	24.50	40