Spontaneous otoacoustic emissions (SOAEs) are the phenomenon of sound emitted by the inner ear in the absence of external stimulation. One potential explanation is that coupled, nonlinear oscillators tend to organize into discrete clusters, oscillating with the same period. While the presence of clusters has been verified in various models, the definition did not consider the phase within a cluster but solely the oscillation period.This study quantifies the phase relations of oscillators within a cluster relative to each other. The model was built of an array of van-der-Pol oscillators with a linear gradient in the oscillation period and scaling to result in an identical phase portrait. The simulations show different sizes of clusters, depending on the type of coupling (reactive/dissipative), the coupling strength and the absence and presence of stochastic variations in the parameters of the array. The oscillation periods of each element in the array were more stable in the presence of an external tone compared to the absence of an external tone. The phase showed a systematic gradient along the length of the array.Linking these results to corresponding information in SOAEs will provide information about the coupling, and ultimately about the mechanics in the inner ear.