  This paper builds on the recent demonstration of three-wave mixing based
phononic frequency comb. Here, in this process, an intrinsic coupling between
the drive and resonant frequency leads to a frequency comb of spacing
corresponding to the separation between drive and resonant frequency. Now, in
this paper, we experimentally demonstrate the possibility to further excite
multiple frequency combs with the same external drive through its coupling with
other identical devices. In addition, we also experimentally identify
interesting features associated with such a frequency comb generation process.
