The simple model introduced in Part I [J. Acoust. Soc. Am.102, 413–429 (1997)] is used to simulate the response of the cochlea to three stimulus tones. The focus is on “emission suppression tuning curves” constructed using a third tone to suppress the cubic distortion tone emission (CDT,2 f1−f2) generated by two primary tones at frequenciesf1andf2(intensitiesL1andL2). A criterion decrease (here, 5 dB) of the CDT emission amplitude defines the2 f1−f2emission suppression tuning curve. Applying traditional tuning curve measures to emission suppression tuning curves appears ineffective in determining the underlying cochlear amplifier characteristics. However, it is shown that there are three characteristics of emission suppression tuning curves which are particularly useful: (1) the “f2threshold” which is the level of the third tone,L3,required for the criterion CDT amplitude decrease, under the condition that the third tone frequency,f3,is approximately equal tof2;(2) the “shoulder threshold” similarly defined forf3≪f2;and (3) the “tuning width,”w40.The tuning width is defined to be the distance (in octaves) from the frequencyf2to the upperf3frequency for which there is a criterion CDT decrease, in this case using theL3level which is 40 dB above thef2threshold. Model calculations appropriate to gerbils show that these measures are most accurately related to the underlying cochlear amplifier characteristics for parameters where the primary stimulus amplitudes satisfyL1/L2>20 dBand for whichL1is 25 dB or more below the sharp “notch” seen in the two tone input–output function. In this parameter region, the cochlear amplifier characteristics are related to measured quantities by the relationshipswr≅w40andGa≅TE+w40gp.Here,Gais the gain (dB) of the cochlear amplifier, defined as the total increase in cochlear response over the passive response,wris the distance (octaves) over which the active cochlear response rises to a maximum, andgpis the passive increase (dB/octave) of the traveling wave along the basilar membrane. The measured quantities areTE,the difference (dB) between the shoulder threshold and thef2threshold, and the tuning width,w40(octaves), defined above. Model predictions are confirmed by measurements in adult gerbils.