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. Author manuscript; available in PMC: 2009 Jul 9.
Published in final edited form as: J Acoust Soc Am. 2005 Apr;117(4 Pt 1):2158–2168. doi: 10.1121/1.1861892

FIG. 1.

FIG. 1

Individual first- (filled squares) and second-order (open symbols) TMTFs for the three listeners using a 5-kHz sinusoidal carrier presented within a notched-noise masker. First- and second-order modulation depths at threshold m and m′ (in %) are plotted as a function of first- and second-order modulation frequency fm and fm′, respectively. The right axis shows detection thresholds in dB (in terms of 20 log m or 20 log m′). The parameter for the second-order TMTFs is the carrier modulation frequency: fm=32 (circles), 64 (diamonds), and 180 Hz (triangles). Error bars represent ± one standard deviation from the mean threshold across three repeated measures.