an operative depicting the capacity to adhere to temporal alterations within the magnitude of a stimulant. In psycho- acoustics, a TMTF is generally attained by gauging how much sinusoidal amplitude modulation is needed to detect the modulation as an operative of frequency of modulation. TMTF's are gauged in other modalities in like ways. The utility of the TMTF is rooted in the linear systems theory, particularly the standard that the transfer operative of a linear system renders a total depiction of the system.