Table 1.

Test frequencies used in the experiments.

	Frequencies #1, kHz	Frequencies #2, kHz	Frequencies #3, kHz	Frequencies #4, kHz	Frequency range, octave
Set #1	12	22	32	50	2.1
Set #2	12	15	19.2	24	1
Set #3	14.4	16	18	20	0.47
Set #4	13.5	14.4	15	16	0.25

For each set of frequencies, SLR decoded four test frequencies from sustained activities. The frequency range is indicated in the rightmost column.